Reduce production built size

package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "babel-preset-env": "^1.6.0",
     "leaflet": "^1.3.1",
-    "lodash": "^4.17.4",
+    "lodash-es": "^4.17.4",
     "material-ui": "npm:material-ui@next",
     "material-ui-old": "npm:material-ui@latest",
     "mdi": "^2.0.46",
@@ -44,6 +44,7 @@
     "flow-typed": "^2.3.0",
     "html-webpack-plugin": "^2.30.1",
     "husky": "^0.14.3",
+    "lodash-webpack-plugin": "^0.11.4",
     "style-loader": "^0.20.1",
     "webpack": "^3.1.0",
     "webpack-dev-server": "^2.11.1",