update webpack-dev-middleware dep

Author: SpaceK33z

package.json

@@ -20,7 +20,7 @@
     "spdy": "^3.4.1",
     "strip-ansi": "^3.0.0",
     "supports-color": "^3.1.1",
-    "webpack-dev-middleware": "^1.4.0",
+    "webpack-dev-middleware": "^1.9.0",
     "yargs": "^6.0.0"
   },
   "devDependencies": {