Install babel-plugin-lodash

The entire lodash bundle is 600kB or so.  We're only using a couple functions.  This plugin transforms import statements such that we don't get all the extra wasted code.

See: https://github.com/lodash/babel-plugin-lodash

package.json

@@ -25,6 +25,7 @@
   "devDependencies": {
     "babel-core": "^6.23.1",
     "babel-loader": "^7.0.0",
+    "babel-plugin-lodash": "^3.2.11",
     "babel-plugin-transform-object-rest-spread": "^6.23.0",
     "babel-preset-es2015-native-modules": "^6.9.4",
     "babel-preset-stage-2": "^6.22.0",

src/.babelrc

@@ -1,3 +1,4 @@
 {
-  "presets": ["es2015", "stage-2"]
+  "presets": ["es2015", "stage-2"],
+  "plugins": ["lodash"]
 }

yarn.lock

@@ -464,6 +464,13 @@ babel-plugin-check-es2015-constants@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
+babel-plugin-lodash@^3.2.11:
+  version "3.2.11"
+  resolved "https://registry.yarnpkg.com/babel-plugin-lodash/-/babel-plugin-lodash-3.2.11.tgz#21c8fdec9fe1835efaa737873e3902bdd66d5701"
+  dependencies:
+    glob "^7.1.1"
+    lodash "^4.17.2"
+
 babel-plugin-minify-builtins@^0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/babel-plugin-minify-builtins/-/babel-plugin-minify-builtins-0.0.2.tgz#f3be6121763c0c518d5ef82067cef4b615c9498c"