update webpack-dev-server

package.json

@@ -136,7 +136,7 @@
     "webpack": "4.25.0",
     "webpack-bundle-analyzer": "2.13.1",
     "webpack-cli": "3.1.0",
-    "webpack-dev-server": "3.1.5",
+    "webpack-dev-server": "3.1.11",
     "webpack-merge": "4.1.4",
     "webpack-node-externals": "1.7.2"
   },