Add es2017-preset (#3624)

packages/babel-preset-es2017/.npmignore

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+src
+test
+node_modules

packages/babel-preset-es2017/README.md

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+# babel-preset-es2017
+
+> Babel preset for all es2017 plugins.
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-es2017
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "presets": ["es2017"]
+}
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --presets es2017
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  presets: ["es2017"]
+});
+```

packages/babel-preset-es2017/index.js

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+module.exports = {
+  plugins: [
+    require("babel-plugin-syntax-trailing-function-commas"),
+    require("babel-plugin-transform-async-to-generator")
+  ]
+};

packages/babel-preset-es2017/package.json

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+{
+  "name": "babel-preset-es2017",
+  "version": "0.0.1",
+  "description": "Babel preset for all es2017 plugins.",
+  "author": "Sebastian McKenzie <sebmck@gmail.com>",
+  "homepage": "https://babeljs.io/",
+  "license": "MIT",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-es2017",
+  "main": "index.js",
+  "dependencies": {
+    "babel-plugin-syntax-trailing-function-commas": "^6.8.0",
+    "babel-plugin-transform-async-to-generator": "^6.8.0"
+  }
+}