Update READMEs for yarn (#8215) [skip ci]

Closes https://github.com/babel/babel/pull/8255

packages/babel-cli/README.md

@@ -9,11 +9,11 @@ See our website [@babel/cli](https://babeljs.io/docs/en/next/babel-cli.html) for
 Using npm:
 
 ```sh
-npm install --save @babel/cli
+npm install --save-dev @babel/cli
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/cli
+yarn add @babel/cli --dev
 ```

packages/babel-code-frame/README.md

@@ -9,11 +9,11 @@ See our website [@babel/code-frame](https://babeljs.io/docs/en/next/babel-code-f
 Using npm:
 
 ```sh
-npm install --save @babel/code-frame
+npm install --save-dev @babel/code-frame
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/code-frame
+yarn add @babel/code-frame --dev
 ```

packages/babel-core/README.md

@@ -9,11 +9,11 @@ See our website [@babel/core](https://babeljs.io/docs/en/next/babel-core.html) f
 Using npm:
 
 ```sh
-npm install --save @babel/core
+npm install --save-dev @babel/core
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/core
+yarn add @babel/core --dev
 ```

packages/babel-generator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/generator](https://babeljs.io/docs/en/next/babel-generat
 Using npm:
 
 ```sh
-npm install --save @babel/generator
+npm install --save-dev @babel/generator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/generator
+yarn add @babel/generator --dev
 ```

packages/babel-helper-annotate-as-pure/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-annotate-as-pure](https://babeljs.io/docs/en/next
 Using npm:
 
 ```sh
-npm install --save @babel/helper-annotate-as-pure
+npm install --save-dev @babel/helper-annotate-as-pure
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-annotate-as-pure
+yarn add @babel/helper-annotate-as-pure --dev
 ```

packages/babel-helper-bindify-decorators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-bindify-decorators](https://babeljs.io/docs/en/ne
 Using npm:
 
 ```sh
-npm install --save @babel/helper-bindify-decorators
+npm install --save-dev @babel/helper-bindify-decorators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-bindify-decorators
+yarn add @babel/helper-bindify-decorators --dev
 ```

packages/babel-helper-builder-binary-assignment-operator-visitor/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-builder-binary-assignment-operator-visitor](https
 Using npm:
 
 ```sh
-npm install --save @babel/helper-builder-binary-assignment-operator-visitor
+npm install --save-dev @babel/helper-builder-binary-assignment-operator-visitor
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-builder-binary-assignment-operator-visitor
+yarn add @babel/helper-builder-binary-assignment-operator-visitor --dev
 ```

packages/babel-helper-builder-react-jsx/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-builder-react-jsx](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/helper-builder-react-jsx
+npm install --save-dev @babel/helper-builder-react-jsx
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-builder-react-jsx
+yarn add @babel/helper-builder-react-jsx --dev
 ```

packages/babel-helper-call-delegate/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-call-delegate](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/helper-call-delegate
+npm install --save-dev @babel/helper-call-delegate
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-call-delegate
+yarn add @babel/helper-call-delegate --dev
 ```

packages/babel-helper-define-map/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-define-map](https://babeljs.io/docs/en/next/babel
 Using npm:
 
 ```sh
-npm install --save @babel/helper-define-map
+npm install --save-dev @babel/helper-define-map
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-define-map
+yarn add @babel/helper-define-map --dev
 ```

packages/babel-helper-explode-assignable-expression/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-explode-assignable-expression](https://babeljs.io
 Using npm:
 
 ```sh
-npm install --save @babel/helper-explode-assignable-expression
+npm install --save-dev @babel/helper-explode-assignable-expression
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-explode-assignable-expression
+yarn add @babel/helper-explode-assignable-expression --dev
 ```

packages/babel-helper-explode-class/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-explode-class](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/helper-explode-class
+npm install --save-dev @babel/helper-explode-class
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-explode-class
+yarn add @babel/helper-explode-class --dev
 ```

packages/babel-helper-fixtures/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-fixtures](https://babeljs.io/docs/en/next/babel-h
 Using npm:
 
 ```sh
-npm install --save @babel/helper-fixtures
+npm install --save-dev @babel/helper-fixtures
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-fixtures
+yarn add @babel/helper-fixtures --dev
 ```

packages/babel-helper-function-name/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-function-name](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/helper-function-name
+npm install --save-dev @babel/helper-function-name
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-function-name
+yarn add @babel/helper-function-name --dev
 ```

packages/babel-helper-get-function-arity/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-get-function-arity](https://babeljs.io/docs/en/ne
 Using npm:
 
 ```sh
-npm install --save @babel/helper-get-function-arity
+npm install --save-dev @babel/helper-get-function-arity
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-get-function-arity
+yarn add @babel/helper-get-function-arity --dev
 ```

packages/babel-helper-hoist-variables/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-hoist-variables](https://babeljs.io/docs/en/next/
 Using npm:
 
 ```sh
-npm install --save @babel/helper-hoist-variables
+npm install --save-dev @babel/helper-hoist-variables
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-hoist-variables
+yarn add @babel/helper-hoist-variables --dev
 ```

packages/babel-helper-member-expression-to-functions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-member-expression-to-functions](https://babeljs.i
 Using npm:
 
 ```sh
-npm install --save @babel/helper-member-expression-to-functions
+npm install --save-dev @babel/helper-member-expression-to-functions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-member-expression-to-functions
+yarn add @babel/helper-member-expression-to-functions --dev
 ```

packages/babel-helper-module-imports/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-module-imports](https://babeljs.io/docs/en/next/b
 Using npm:
 
 ```sh
-npm install --save @babel/helper-module-imports
+npm install --save-dev @babel/helper-module-imports
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-module-imports
+yarn add @babel/helper-module-imports --dev
 ```

packages/babel-helper-module-transforms/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-module-transforms](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/helper-module-transforms
+npm install --save-dev @babel/helper-module-transforms
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-module-transforms
+yarn add @babel/helper-module-transforms --dev
 ```

packages/babel-helper-optimise-call-expression/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-optimise-call-expression](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/helper-optimise-call-expression
+npm install --save-dev @babel/helper-optimise-call-expression
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-optimise-call-expression
+yarn add @babel/helper-optimise-call-expression --dev
 ```

packages/babel-helper-plugin-test-runner/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-plugin-test-runner](https://babeljs.io/docs/en/ne
 Using npm:
 
 ```sh
-npm install --save @babel/helper-plugin-test-runner
+npm install --save-dev @babel/helper-plugin-test-runner
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-plugin-test-runner
+yarn add @babel/helper-plugin-test-runner --dev
 ```

packages/babel-helper-plugin-utils/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-plugin-utils](https://babeljs.io/docs/en/next/bab
 Using npm:
 
 ```sh
-npm install --save @babel/helper-plugin-utils
+npm install --save-dev @babel/helper-plugin-utils
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-plugin-utils
+yarn add @babel/helper-plugin-utils --dev
 ```

packages/babel-helper-regex/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-regex](https://babeljs.io/docs/en/next/babel-help
 Using npm:
 
 ```sh
-npm install --save @babel/helper-regex
+npm install --save-dev @babel/helper-regex
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-regex
+yarn add @babel/helper-regex --dev
 ```

packages/babel-helper-remap-async-to-generator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-remap-async-to-generator](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/helper-remap-async-to-generator
+npm install --save-dev @babel/helper-remap-async-to-generator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-remap-async-to-generator
+yarn add @babel/helper-remap-async-to-generator --dev
 ```

packages/babel-helper-replace-supers/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-replace-supers](https://babeljs.io/docs/en/next/b
 Using npm:
 
 ```sh
-npm install --save @babel/helper-replace-supers
+npm install --save-dev @babel/helper-replace-supers
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-replace-supers
+yarn add @babel/helper-replace-supers --dev
 ```

packages/babel-helper-simple-access/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-simple-access](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/helper-simple-access
+npm install --save-dev @babel/helper-simple-access
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-simple-access
+yarn add @babel/helper-simple-access --dev
 ```

packages/babel-helper-split-export-declaration/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-split-export-declaration](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/helper-split-export-declaration
+npm install --save-dev @babel/helper-split-export-declaration
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-split-export-declaration
+yarn add @babel/helper-split-export-declaration --dev
 ```

packages/babel-helper-transform-fixture-test-runner/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-transform-fixture-test-runner](https://babeljs.io
 Using npm:
 
 ```sh
-npm install --save @babel/helper-transform-fixture-test-runner
+npm install --save-dev @babel/helper-transform-fixture-test-runner
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-transform-fixture-test-runner
+yarn add @babel/helper-transform-fixture-test-runner --dev
 ```

packages/babel-helper-wrap-function/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helper-wrap-function](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/helper-wrap-function
+npm install --save-dev @babel/helper-wrap-function
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helper-wrap-function
+yarn add @babel/helper-wrap-function --dev
 ```

packages/babel-helpers/README.md

@@ -9,11 +9,11 @@ See our website [@babel/helpers](https://babeljs.io/docs/en/next/babel-helpers.h
 Using npm:
 
 ```sh
-npm install --save @babel/helpers
+npm install --save-dev @babel/helpers
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/helpers
+yarn add @babel/helpers --dev
 ```

packages/babel-highlight/README.md

@@ -9,11 +9,11 @@ See our website [@babel/highlight](https://babeljs.io/docs/en/next/babel-highlig
 Using npm:
 
 ```sh
-npm install --save @babel/highlight
+npm install --save-dev @babel/highlight
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/highlight
+yarn add @babel/highlight --dev
 ```

packages/babel-node/README.md

@@ -9,11 +9,11 @@ See our website [@babel/node](https://babeljs.io/docs/en/next/babel-node.html) f
 Using npm:
 
 ```sh
-npm install --save @babel/node
+npm install --save-dev @babel/node
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/node
+yarn add @babel/node --dev
 ```

packages/babel-parser/README.md

@@ -9,11 +9,11 @@ See our website [@babel/parser](https://babeljs.io/docs/en/next/babel-parser.htm
 Using npm:
 
 ```sh
-npm install --save @babel/parser
+npm install --save-dev @babel/parser
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/parser
+yarn add @babel/parser --dev
 ```

packages/babel-plugin-external-helpers/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-external-helpers](https://babeljs.io/docs/en/next
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-external-helpers
+npm install --save-dev @babel/plugin-external-helpers
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-external-helpers
+yarn add @babel/plugin-external-helpers --dev
 ```

packages/babel-plugin-proposal-async-generator-functions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-async-generator-functions](https://babel
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-async-generator-functions
+npm install --save-dev @babel/plugin-proposal-async-generator-functions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-async-generator-functions
+yarn add @babel/plugin-proposal-async-generator-functions --dev
 ```

packages/babel-plugin-proposal-class-properties/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-class-properties](https://babeljs.io/doc
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-class-properties
+npm install --save-dev @babel/plugin-proposal-class-properties
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-class-properties
+yarn add @babel/plugin-proposal-class-properties --dev
 ```

packages/babel-plugin-proposal-decorators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-decorators](https://babeljs.io/docs/en/n
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-decorators
+npm install --save-dev @babel/plugin-proposal-decorators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-decorators
+yarn add @babel/plugin-proposal-decorators --dev
 ```

packages/babel-plugin-proposal-do-expressions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-do-expressions](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-do-expressions
+npm install --save-dev @babel/plugin-proposal-do-expressions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-do-expressions
+yarn add @babel/plugin-proposal-do-expressions --dev
 ```

packages/babel-plugin-proposal-export-default-from/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-export-default-from](https://babeljs.io/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-export-default-from
+npm install --save-dev @babel/plugin-proposal-export-default-from
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-export-default-from
+yarn add @babel/plugin-proposal-export-default-from --dev
 ```

packages/babel-plugin-proposal-export-namespace-from/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-export-namespace-from](https://babeljs.i
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-export-namespace-from
+npm install --save-dev @babel/plugin-proposal-export-namespace-from
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-export-namespace-from
+yarn add @babel/plugin-proposal-export-namespace-from --dev
 ```

packages/babel-plugin-proposal-function-bind/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-function-bind](https://babeljs.io/docs/e
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-function-bind
+npm install --save-dev @babel/plugin-proposal-function-bind
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-function-bind
+yarn add @babel/plugin-proposal-function-bind --dev
 ```

packages/babel-plugin-proposal-function-sent/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-function-sent](https://babeljs.io/docs/e
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-function-sent
+npm install --save-dev @babel/plugin-proposal-function-sent
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-function-sent
+yarn add @babel/plugin-proposal-function-sent --dev
 ```

packages/babel-plugin-proposal-json-strings/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-json-strings](https://babeljs.io/docs/en
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-json-strings
+npm install --save-dev @babel/plugin-proposal-json-strings
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-json-strings
+yarn add @babel/plugin-proposal-json-strings --dev
 ```

packages/babel-plugin-proposal-logical-assignment-operators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-logical-assignment-operators](https://ba
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-logical-assignment-operators
+npm install --save-dev @babel/plugin-proposal-logical-assignment-operators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-logical-assignment-operators
+yarn add @babel/plugin-proposal-logical-assignment-operators --dev
 ```

packages/babel-plugin-proposal-nullish-coalescing-operator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-nullish-coalescing-operator](https://bab
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-nullish-coalescing-operator
+npm install --save-dev @babel/plugin-proposal-nullish-coalescing-operator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-nullish-coalescing-operator
+yarn add @babel/plugin-proposal-nullish-coalescing-operator --dev
 ```

packages/babel-plugin-proposal-numeric-separator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-numeric-separator](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-numeric-separator
+npm install --save-dev @babel/plugin-proposal-numeric-separator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-numeric-separator
+yarn add @babel/plugin-proposal-numeric-separator --dev
 ```

packages/babel-plugin-proposal-object-rest-spread/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-object-rest-spread](https://babeljs.io/d
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-object-rest-spread
+npm install --save-dev @babel/plugin-proposal-object-rest-spread
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-object-rest-spread
+yarn add @babel/plugin-proposal-object-rest-spread --dev
 ```

packages/babel-plugin-proposal-optional-catch-binding/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-optional-catch-binding](https://babeljs.
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-optional-catch-binding
+npm install --save-dev @babel/plugin-proposal-optional-catch-binding
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-optional-catch-binding
+yarn add @babel/plugin-proposal-optional-catch-binding --dev
 ```

packages/babel-plugin-proposal-optional-chaining/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-optional-chaining](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-optional-chaining
+npm install --save-dev @babel/plugin-proposal-optional-chaining
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-optional-chaining
+yarn add @babel/plugin-proposal-optional-chaining --dev
 ```

packages/babel-plugin-proposal-pipeline-operator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-pipeline-operator](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-pipeline-operator
+npm install --save-dev @babel/plugin-proposal-pipeline-operator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-pipeline-operator
+yarn add @babel/plugin-proposal-pipeline-operator --dev
 ```

packages/babel-plugin-proposal-throw-expressions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-throw-expressions](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-throw-expressions
+npm install --save-dev @babel/plugin-proposal-throw-expressions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-throw-expressions
+yarn add @babel/plugin-proposal-throw-expressions --dev
 ```

packages/babel-plugin-proposal-unicode-property-regex/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-proposal-unicode-property-regex](https://babeljs.
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-proposal-unicode-property-regex
+npm install --save-dev @babel/plugin-proposal-unicode-property-regex
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-proposal-unicode-property-regex
+yarn add @babel/plugin-proposal-unicode-property-regex --dev
 ```

packages/babel-plugin-syntax-async-generators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-async-generators](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-async-generators
+npm install --save-dev @babel/plugin-syntax-async-generators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-async-generators
+yarn add @babel/plugin-syntax-async-generators --dev
 ```

packages/babel-plugin-syntax-bigint/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-bigint](https://babeljs.io/docs/en/next/ba
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-bigint
+npm install --save-dev @babel/plugin-syntax-bigint
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-bigint
+yarn add @babel/plugin-syntax-bigint --dev
 ```

packages/babel-plugin-syntax-class-properties/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-class-properties](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-class-properties
+npm install --save-dev @babel/plugin-syntax-class-properties
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-class-properties
+yarn add @babel/plugin-syntax-class-properties --dev
 ```

packages/babel-plugin-syntax-decorators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-decorators](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-decorators
+npm install --save-dev @babel/plugin-syntax-decorators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-decorators
+yarn add @babel/plugin-syntax-decorators --dev
 ```

packages/babel-plugin-syntax-do-expressions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-do-expressions](https://babeljs.io/docs/en
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-do-expressions
+npm install --save-dev @babel/plugin-syntax-do-expressions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-do-expressions
+yarn add @babel/plugin-syntax-do-expressions --dev
 ```

packages/babel-plugin-syntax-dynamic-import/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-dynamic-import](https://babeljs.io/docs/en
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-dynamic-import
+npm install --save-dev @babel/plugin-syntax-dynamic-import
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-dynamic-import
+yarn add @babel/plugin-syntax-dynamic-import --dev
 ```

packages/babel-plugin-syntax-export-default-from/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-export-default-from](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-export-default-from
+npm install --save-dev @babel/plugin-syntax-export-default-from
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-export-default-from
+yarn add @babel/plugin-syntax-export-default-from --dev
 ```

packages/babel-plugin-syntax-export-namespace-from/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-export-namespace-from](https://babeljs.io/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-export-namespace-from
+npm install --save-dev @babel/plugin-syntax-export-namespace-from
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-export-namespace-from
+yarn add @babel/plugin-syntax-export-namespace-from --dev
 ```

packages/babel-plugin-syntax-flow/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-flow](https://babeljs.io/docs/en/next/babe
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-flow
+npm install --save-dev @babel/plugin-syntax-flow
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-flow
+yarn add @babel/plugin-syntax-flow --dev
 ```

packages/babel-plugin-syntax-function-bind/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-function-bind](https://babeljs.io/docs/en/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-function-bind
+npm install --save-dev @babel/plugin-syntax-function-bind
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-function-bind
+yarn add @babel/plugin-syntax-function-bind --dev
 ```

packages/babel-plugin-syntax-function-sent/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-function-sent](https://babeljs.io/docs/en/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-function-sent
+npm install --save-dev @babel/plugin-syntax-function-sent
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-function-sent
+yarn add @babel/plugin-syntax-function-sent --dev
 ```

packages/babel-plugin-syntax-import-meta/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-import-meta](https://babeljs.io/docs/en/ne
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-import-meta
+npm install --save-dev @babel/plugin-syntax-import-meta
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-import-meta
+yarn add @babel/plugin-syntax-import-meta --dev
 ```

packages/babel-plugin-syntax-json-strings/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-json-strings](https://babeljs.io/docs/en/n
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-json-strings
+npm install --save-dev @babel/plugin-syntax-json-strings
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-json-strings
+yarn add @babel/plugin-syntax-json-strings --dev
 ```

packages/babel-plugin-syntax-jsx/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-jsx](https://babeljs.io/docs/en/next/babel
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-jsx
+npm install --save-dev @babel/plugin-syntax-jsx
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-jsx
+yarn add @babel/plugin-syntax-jsx --dev
 ```

packages/babel-plugin-syntax-logical-assignment-operators/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-logical-assignment-operators](https://babe
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-logical-assignment-operators
+npm install --save-dev @babel/plugin-syntax-logical-assignment-operators
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-logical-assignment-operators
+yarn add @babel/plugin-syntax-logical-assignment-operators --dev
 ```

packages/babel-plugin-syntax-nullish-coalescing-operator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-nullish-coalescing-operator](https://babel
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-nullish-coalescing-operator
+npm install --save-dev @babel/plugin-syntax-nullish-coalescing-operator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-nullish-coalescing-operator
+yarn add @babel/plugin-syntax-nullish-coalescing-operator --dev
 ```

packages/babel-plugin-syntax-numeric-separator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-numeric-separator](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-numeric-separator
+npm install --save-dev @babel/plugin-syntax-numeric-separator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-numeric-separator
+yarn add @babel/plugin-syntax-numeric-separator --dev
 ```

packages/babel-plugin-syntax-object-rest-spread/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-object-rest-spread](https://babeljs.io/doc
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-object-rest-spread
+npm install --save-dev @babel/plugin-syntax-object-rest-spread
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-object-rest-spread
+yarn add @babel/plugin-syntax-object-rest-spread --dev
 ```

packages/babel-plugin-syntax-optional-catch-binding/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-optional-catch-binding](https://babeljs.io
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-optional-catch-binding
+npm install --save-dev @babel/plugin-syntax-optional-catch-binding
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-optional-catch-binding
+yarn add @babel/plugin-syntax-optional-catch-binding --dev
 ```

packages/babel-plugin-syntax-optional-chaining/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-optional-chaining](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-optional-chaining
+npm install --save-dev @babel/plugin-syntax-optional-chaining
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-optional-chaining
+yarn add @babel/plugin-syntax-optional-chaining --dev
 ```

packages/babel-plugin-syntax-pipeline-operator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-pipeline-operator](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-pipeline-operator
+npm install --save-dev @babel/plugin-syntax-pipeline-operator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-pipeline-operator
+yarn add @babel/plugin-syntax-pipeline-operator --dev
 ```

packages/babel-plugin-syntax-throw-expressions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-throw-expressions](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-throw-expressions
+npm install --save-dev @babel/plugin-syntax-throw-expressions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-throw-expressions
+yarn add @babel/plugin-syntax-throw-expressions --dev
 ```

packages/babel-plugin-syntax-typescript/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-syntax-typescript](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-syntax-typescript
+npm install --save-dev @babel/plugin-syntax-typescript
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-syntax-typescript
+yarn add @babel/plugin-syntax-typescript --dev
 ```

packages/babel-plugin-transform-arrow-functions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-arrow-functions](https://babeljs.io/doc
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-arrow-functions
+npm install --save-dev @babel/plugin-transform-arrow-functions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-arrow-functions
+yarn add @babel/plugin-transform-arrow-functions --dev
 ```

packages/babel-plugin-transform-async-to-generator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-async-to-generator](https://babeljs.io/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-async-to-generator
+npm install --save-dev @babel/plugin-transform-async-to-generator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-async-to-generator
+yarn add @babel/plugin-transform-async-to-generator --dev
 ```

packages/babel-plugin-transform-block-scoped-functions/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-block-scoped-functions](https://babeljs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-block-scoped-functions
+npm install --save-dev @babel/plugin-transform-block-scoped-functions
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-block-scoped-functions
+yarn add @babel/plugin-transform-block-scoped-functions --dev
 ```

packages/babel-plugin-transform-block-scoping/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-block-scoping](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-block-scoping
+npm install --save-dev @babel/plugin-transform-block-scoping
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-block-scoping
+yarn add @babel/plugin-transform-block-scoping --dev
 ```

packages/babel-plugin-transform-classes/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-classes](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-classes
+npm install --save-dev @babel/plugin-transform-classes
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-classes
+yarn add @babel/plugin-transform-classes --dev
 ```

packages/babel-plugin-transform-computed-properties/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-computed-properties](https://babeljs.io
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-computed-properties
+npm install --save-dev @babel/plugin-transform-computed-properties
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-computed-properties
+yarn add @babel/plugin-transform-computed-properties --dev
 ```

packages/babel-plugin-transform-destructuring/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-destructuring](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-destructuring
+npm install --save-dev @babel/plugin-transform-destructuring
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-destructuring
+yarn add @babel/plugin-transform-destructuring --dev
 ```

packages/babel-plugin-transform-dotall-regex/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-dotall-regex](https://babeljs.io/docs/e
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-dotall-regex
+npm install --save-dev @babel/plugin-transform-dotall-regex
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-dotall-regex
+yarn add @babel/plugin-transform-dotall-regex --dev
 ```

packages/babel-plugin-transform-duplicate-keys/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-duplicate-keys](https://babeljs.io/docs
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-duplicate-keys
+npm install --save-dev @babel/plugin-transform-duplicate-keys
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-duplicate-keys
+yarn add @babel/plugin-transform-duplicate-keys --dev
 ```

packages/babel-plugin-transform-exponentiation-operator/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-exponentiation-operator](https://babelj
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-exponentiation-operator
+npm install --save-dev @babel/plugin-transform-exponentiation-operator
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-exponentiation-operator
+yarn add @babel/plugin-transform-exponentiation-operator --dev
 ```

packages/babel-plugin-transform-flow-comments/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-flow-comments](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-flow-comments
+npm install --save-dev @babel/plugin-transform-flow-comments
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-flow-comments
+yarn add @babel/plugin-transform-flow-comments --dev
 ```

packages/babel-plugin-transform-flow-strip-types/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-flow-strip-types](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-flow-strip-types
+npm install --save-dev @babel/plugin-transform-flow-strip-types
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-flow-strip-types
+yarn add @babel/plugin-transform-flow-strip-types --dev
 ```

packages/babel-plugin-transform-for-of/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-for-of](https://babeljs.io/docs/en/next
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-for-of
+npm install --save-dev @babel/plugin-transform-for-of
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-for-of
+yarn add @babel/plugin-transform-for-of --dev
 ```

packages/babel-plugin-transform-function-name/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-function-name](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-function-name
+npm install --save-dev @babel/plugin-transform-function-name
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-function-name
+yarn add @babel/plugin-transform-function-name --dev
 ```

packages/babel-plugin-transform-instanceof/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-instanceof](https://babeljs.io/docs/en/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-instanceof
+npm install --save-dev @babel/plugin-transform-instanceof
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-instanceof
+yarn add @babel/plugin-transform-instanceof --dev
 ```

packages/babel-plugin-transform-jscript/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-jscript](https://babeljs.io/docs/en/nex
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-jscript
+npm install --save-dev @babel/plugin-transform-jscript
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-jscript
+yarn add @babel/plugin-transform-jscript --dev
 ```

packages/babel-plugin-transform-literals/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-literals](https://babeljs.io/docs/en/ne
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-literals
+npm install --save-dev @babel/plugin-transform-literals
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-literals
+yarn add @babel/plugin-transform-literals --dev
 ```

packages/babel-plugin-transform-member-expression-literals/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-member-expression-literals](https://bab
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-member-expression-literals
+npm install --save-dev @babel/plugin-transform-member-expression-literals
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-member-expression-literals
+yarn add @babel/plugin-transform-member-expression-literals --dev
 ```

packages/babel-plugin-transform-modules-amd/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-modules-amd](https://babeljs.io/docs/en
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-modules-amd
+npm install --save-dev @babel/plugin-transform-modules-amd
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-modules-amd
+yarn add @babel/plugin-transform-modules-amd --dev
 ```

packages/babel-plugin-transform-modules-commonjs/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-modules-commonjs](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-modules-commonjs
+npm install --save-dev @babel/plugin-transform-modules-commonjs
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-modules-commonjs
+yarn add @babel/plugin-transform-modules-commonjs --dev
 ```

packages/babel-plugin-transform-modules-systemjs/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-modules-systemjs](https://babeljs.io/do
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-modules-systemjs
+npm install --save-dev @babel/plugin-transform-modules-systemjs
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-modules-systemjs
+yarn add @babel/plugin-transform-modules-systemjs --dev
 ```

packages/babel-plugin-transform-modules-umd/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-modules-umd](https://babeljs.io/docs/en
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-modules-umd
+npm install --save-dev @babel/plugin-transform-modules-umd
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-modules-umd
+yarn add @babel/plugin-transform-modules-umd --dev
 ```

packages/babel-plugin-transform-new-target/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-new-target](https://babeljs.io/docs/en/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-new-target
+npm install --save-dev @babel/plugin-transform-new-target
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-new-target
+yarn add @babel/plugin-transform-new-target --dev
 ```

packages/babel-plugin-transform-object-assign/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-object-assign](https://babeljs.io/docs/
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-object-assign
+npm install --save-dev @babel/plugin-transform-object-assign
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-object-assign
+yarn add @babel/plugin-transform-object-assign --dev
 ```

packages/babel-plugin-transform-object-set-prototype-of-to-assign/README.md

@@ -9,11 +9,11 @@ See our website [@babel/plugin-transform-object-set-prototype-of-to-assign](http
 Using npm:
 
 ```sh
-npm install --save @babel/plugin-transform-object-set-prototype-of-to-assign
+npm install --save-dev @babel/plugin-transform-object-set-prototype-of-to-assign
 ```
 
 or using yarn:
 
 ```sh
-yarn add --save @babel/plugin-transform-object-set-prototype-of-to-assign
+yarn add @babel/plugin-transform-object-set-prototype-of-to-assign --dev
 ```