Update dependency webpack-dev-server to v3.11.0

Author: renovate-bot

package.json

@@ -128,7 +128,7 @@
     "style-loader": "1.2.1",
     "webpack": "4.43.0",
     "webpack-cli": "3.3.11",
-    "webpack-dev-server": "3.10.3",
+    "webpack-dev-server": "3.11.0",
     "optimize-css-assets-webpack-plugin": "5.0.3",
     "terser-webpack-plugin": "2.3.6",
     "webpack-merge": "4.2.2"