Merge pull request #18 from mzgoddard/webpack-4

Update to webpack 4

package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "babel-core": "^6.26.0",
     "babel-eslint": "^7.2.3",
-    "babel-loader": "^7.1.2",
+    "babel-loader": "^7.1.4",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-preset-es2015": "^6.24.1",
     "eslint": "^4.6.1",
@@ -46,6 +46,7 @@
     "mkdirp": "^0.5.1",
     "react-intl": "2.4.0",
     "rimraf": "^2.6.2",
-    "webpack": "^3.5.6"
+    "webpack": "^4.6.0",
+    "webpack-cli": "^2.0.15"
   }
 }

webpack.config.js

@@ -1,6 +1,7 @@
 const path = require('path');
 
 module.exports = {
+    mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
     devtool: 'cheap-module-source-map',
     module: {
         rules: [{