chore(package): support for jsnext:main (#1210)

* chore(package): support for jsnext:main

* chore(package): lodash plugin goes back

.babelrc

@@ -1,6 +1,6 @@
 {
   "presets": [
-    "es2015",
+    "./build/preset-es2015",
     "react",
     "stage-1"
   ],

build/preset-es2015.js

@@ -0,0 +1,7 @@
+const options = process.env.BABEL_ENV === 'es' ? { modules: false } : {}
+
+module.exports = {
+  presets: [
+    ['es2015', options],
+  ],
+}

package.json

@@ -2,17 +2,21 @@
   "name": "semantic-ui-react",
   "version": "0.64.3",
   "description": "The official Semantic-UI-React integration.",
+  "jsnext:main": "dist/es/index.js",
   "main": "dist/commonjs/index.js",
+  "module": "dist/es/index.js",
   "files": [
     "src",
     "dist",
     "index.d.ts"
   ],
   "scripts": {
     "docs": "gulp docs",
-    "build": "npm run build:commonjs && npm run build:umd && npm run build:docs",
+    "build": "npm run build:commonjs && npm run build:es && npm run build:umd && npm run build:docs",
     "prebuild:commonjs": "rimraf dist/commonjs",
     "build:commonjs": "babel src -d dist/commonjs && npm run tsd",
+    "prebuild:es": "rimraf dist/es",
+    "build:es": "cross-env BABEL_ENV=es babel src -d dist/es",
     "prebuild:docs": "npm run build:docs-toc",
     "build:dll": "gulp dll",
     "build:docs": "gulp build:docs",