added basic support for module attributes and tests updated (#10962)

Co-Authored-By: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

packages/babel-plugin-syntax-module-attributes/.npmignore

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+*.log
+src
+test

packages/babel-plugin-syntax-module-attributes/README.md

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+# @babel/plugin-syntax-module-attributes
+
+> Allow parsing of the module attributes in the import statements
+
+See our website [@babel/plugin-syntax-module-attributes](https://babeljs.io/docs/en/next/babel-plugin-syntax-module-attributes.html) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save-dev @babel/plugin-syntax-module-attributes
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/plugin-syntax-module-attributes --dev
+```

packages/babel-plugin-syntax-module-attributes/package.json

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+{
+  "name": "@babel/plugin-syntax-module-attributes",
+  "version": "7.8.3",
+  "description": "Allow parsing of the module attributes in the import statement",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-module-attributes",
+  "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
+  "main": "lib/index.js",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "^7.8.3"
+  },
+  "peerDependencies": {
+    "@babel/core": "^7.0.0-0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.8.3"
+  }
+}

packages/babel-plugin-syntax-module-attributes/src/index.js

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+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare((api, { version }) => {
+  api.assertVersion(7);
+
+  if (typeof version !== "string" || version !== "apr-2020") {
+    throw new Error(
+      "The 'moduleAttributes' plugin requires a 'version' option," +
+        " representing the last proposal update. Currently, the" +
+        " only supported value is 'apr-2020'.",
+    );
+  }
+
+  return {
+    name: "syntax-module-attributes",
+
+    manipulateOptions(opts, parserOpts) {
+      parserOpts.plugins.push(["moduleAttributes", { version }]);
+    },
+  };
+});