chore(deps): update dependency webpack-dev-server to v3.11.1

Author: renovate-bot

package.json

@@ -62,6 +62,6 @@
     "url-loader": "2.0.1",
     "webpack": "4.35.3",
     "webpack-cli": "3.3.5",
-    "webpack-dev-server": "3.7.2"
+    "webpack-dev-server": "3.11.1"
   }
 }