Webpack up.

package.json

@@ -53,7 +53,7 @@
     "raw-loader": "^0.5.1",
     "style-loader": "^0.21.0",
     "uglifyjs-webpack-plugin": "^1.2.7",
-    "webpack": "^4.12.2",
+    "webpack": "^4.15.0",
     "webpack-cli": "^3.0.8"
   },
   "engines": {