feat(package): update webpack-dev-server to 3.1.7

Author: joshuawilson

package.json

@@ -215,7 +215,7 @@
     "webpack-bundle-analyzer": "2.13.1",
     "webpack-cli": "3.1.0",
     "webpack-dev-middleware": "3.2.0",
-    "webpack-dev-server": "3.1.6",
+    "webpack-dev-server": "3.1.7",
     "webpack-dll-bundles-plugin": "1.0.0-beta.5",
     "webpack-md5-hash": "0.0.6",
     "webpack-merge": "4.1.4",