Add lodash transformation to save a few kbs.

.babelrc

 {
   "presets": ["es2015", "stage-2"],
-  "plugins": ["transform-runtime"],
+  "plugins": ["transform-runtime", "lodash"],
   "comments": false
 }

package.json

@@ -14,6 +14,7 @@
   },
   "dependencies": {
     "babel-plugin-add-module-exports": "^0.2.1",
+    "babel-plugin-lodash": "^3.2.11",
     "diff": "^3.0.1",
     "karma-mocha-reporter": "^2.2.1",
     "node-sass": "^3.10.1",