Update dependency webpack-dev-server to v3.11.3

Author: renovate-bot

package.json

@@ -23,7 +23,7 @@
     "style-loader": "0.23.1",
     "webpack": "4.32.2",
     "webpack-cli": "3.3.2",
-    "webpack-dev-server": "3.4.1"
+    "webpack-dev-server": "3.11.3"
   },
   "dependencies": {
     "axios": "^0.19.0",