Merge pull request #20 from krystalcampioni/dependabot/npm_and_yarn/webpack-dev-server-3.1.11

Bump webpack-dev-server from 2.4.5 to 3.1.11

Author: krystalcampioni

package.json

@@ -59,7 +59,7 @@
     "vue-loader": "^12.1.0",
     "vue-template-compiler": "^2.3.3",
     "webpack": "^2.6.0",
-    "webpack-dev-server": "^2.4.5"
+    "webpack-dev-server": "^3.1.11"
   },
   "dependencies": {
     "vue-highlightjs": "^1.3.3"