Add babel-loader to solve Edge browser issue

package.json

@@ -20,6 +20,9 @@
   ],
   "license": "Apache-2.0",
   "devDependencies": {
+    "@babel/core": "^7.4.4",
+    "@babel/preset-env": "^7.4.4",
+    "babel-loader": "^8.0.6",
     "eslint": "^5.9.0",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-plugin-import": "^2.14.0",

scripts/webpack.config.common.js

@@ -0,0 +1,23 @@
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.m?js$/,
+        // exclude: /(node_modules|bower_components)/,
+        use: {
+          loader: 'babel-loader',
+          options: {
+            presets: [
+              [
+                '@babel/preset-env',
+                {
+                  targets: 'last 2 versions',
+                }
+              ]
+            ],
+          }
+        }
+      }
+    ]
+  },
+};

scripts/webpack.config.dev.js

@@ -1,9 +1,11 @@
 const path = require('path');
 const webpack = require('webpack');
+const common = require('./webpack.config.common');
 
 const genConfig = ({
   entry, filename, library, libraryTarget,
 }) => ({
+  ...common,
   mode: 'development',
   entry,
   output: {

scripts/webpack.config.prod.js

@@ -1,8 +1,10 @@
 const path = require('path');
+const common = require('./webpack.config.common');
 
 const genConfig = ({
   entry, filename, library, libraryTarget,
 }) => ({
+  ...common,
   mode: 'production',
   devtool: 'source-map',
   entry,