feat([publish]): migrate to babel-preset-env

The change isn't breaking because with default browserlist, it still includes all the transforms
from `es2015-17`

README.md

@@ -3,9 +3,9 @@
 [![official JetBrains project](http://jb.gg/badges/official-flat-square.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
 
 This preset includes all plugins from the [official](https://babeljs.io/docs/plugins/#presets-official-presets) presets
-`es2015-17`, `stage-2`, `react`,
+`env` (with [`browserlist` defaults](https://github.com/ai/browserslist#queries) as target), `stage-2`, `react`,
 and one extra plugin:
-[`transform-strict-mode`](http://babeljs.io/docs/plugins/transform-strict-mode). `es2015` is used with `{modules: false}` option, because webpack 2 uses native imports for tree shaking.
+[`transform-strict-mode`](http://babeljs.io/docs/plugins/transform-strict-mode). `env` is used with `{modules: false}` option, because webpack 2 uses native imports for tree shaking.
 
 **Note to maintainers**: to trigger publishing of the npm package append *\[Publish\]* to the commit message. For example:
 

index.js

@@ -1,9 +1,12 @@
 module.exports = {
   presets: [
     require('babel-preset-react'),
-    [require('babel-preset-es2015').buildPreset, {modules: false}],
-    require('babel-preset-es2016'),
-    require('babel-preset-es2017'),
+    [require('babel-preset-env'), {
+      targets: {
+        browsers: 'defaults'
+      },
+      modules: false
+    }],
     require('babel-preset-stage-2')
   ],
   plugins: [

package.json

@@ -14,9 +14,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "babel-plugin-transform-strict-mode": "6.24.1",
-    "babel-preset-es2015": "6.24.1",
-    "babel-preset-es2016": "6.24.1",
-    "babel-preset-es2017": "6.24.1",
+    "babel-preset-env": "1.6.1",
     "babel-preset-react": "6.24.1",
     "babel-preset-stage-2": "6.24.1"
   },