Merge branch 'leipert-fix-unsecure-npm-deps' into 'master'

Fix unsecure node dependencies

See merge request gitlab-org/gitlab-ce!23378

package.json

@@ -141,6 +141,6 @@
     "karma-webpack": "^4.0.0-beta.0",
     "nodemon": "^1.18.4",
     "prettier": "1.15.2",
-    "webpack-dev-server": "^3.1.8"
+    "webpack-dev-server": "^3.1.10"
   }
 }