chore(package): update webpack-dev-middleware to version 3.0.1

Closes #120

Author: greenkeeper[bot]

package.json

@@ -142,7 +142,7 @@
     "vue-template-compiler": "^2.4.4",
     "vue-template-es2015-loader": "^2.1.2",
     "webpack": "^3.6.0",
-    "webpack-dev-middleware": "^2.0.0",
+    "webpack-dev-middleware": "^3.0.1",
     "webpack-dev-server": "^2.9.1",
     "webpack-hot-middleware": "^2.19.1",
     "yargs": "^11.0.0"