Use babel-preset-env

package.json

@@ -61,7 +61,7 @@
   "devDependencies": {
     "babel-core": "6.24.1",
     "babel-loader": "7.0.0",
-    "babel-preset-es2015": "6.24.1",
+    "babel-preset-env": "1.4.0",
     "chai": "3.5.0",
     "eslint": "3.19.0",
     "font-awesome": "4.7.0",

webpack.config.js

@@ -37,7 +37,11 @@ let config = {
 					loader: "babel-loader",
 					options: {
 						presets: [
-							"es2015"
+							["env", {
+								targets: {
+									browsers: "last 2 versions"
+								}
+							}]
 						]
 					}
 				}