message: replace preset-es2015 with preset-env
  preset-es2015 was already deprecated and should be replaced by preset-env
diff: @@ -97,12 +97,12 @@ _Note: Explicitly installing `regenerator-runtime` is not needed if you use
  Don't forget to add a [`.babelrc`](https://babeljs.io/docs/usage/babelrc/) file
  in your project's root folder. For example, if you are using ES6 and
  [React.js](https://facebook.github.io/react/) with the
  -[`babel-preset-es2015`](https://babeljs.io/docs/plugins/preset-es2015/) and
  +[`babel-preset-env`](https://babeljs.io/docs/plugins/preset-env/) and
  [`babel-preset-react`](https://babeljs.io/docs/plugins/preset-react/) presets:
  ```json
  {
  - "presets": ["es2015", "react"]
  + "presets": ["env", "react"]
  }
  ```
  @@ -113,16 +113,16 @@ You are now set up to use all ES6 features and React specific syntax.
  > `test`. It will not use `development` section like Babel does by default when
  > no `NODE_ENV` is set.
  -> Note: If you've turned off transpilation of ES2015 modules with the option
  +> Note: If you've turned off transpilation of ES6 modules with the option
  > `{ "modules": false }`, you have to make sure to turn this on in your test
  > environment.
  ```json
  {
  - "presets": [["es2015", {"modules": false}], "react"],
  + "presets": [["env", {"modules": false}], "react"],
  "env": {
  "test": {
  - "presets": [["es2015"], "react"]
  + "presets": [["env"], "react"]
  }
  }
  }
  