Shave a few bytes with babel-plugin-external-helpers

Author: STRML

.babelrc

@@ -6,6 +6,7 @@
   ],
   "plugins": [
     "transform-flow-comments",
+    "external-helpers",
   ],
   "env": {
     "test": {

package.json

@@ -32,6 +32,7 @@
     "babel-eslint": "^6.1.2",
     "babel-loader": "^6.2.4",
     "babel-plugin-espower": "^2.3.1",
+    "babel-plugin-external-helpers": "^6.8.0",
     "babel-plugin-transform-flow-comments": "^6.8.0",
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-react": "^6.11.1",