Update webpack

* webpack 1.9.5 -> 1.10.0
* webpack-dev-server 1.8.2 -> 1.10.1

package.json

@@ -54,8 +54,8 @@
     "rewire": "2.3.4",
     "rewire-webpack": "1.0.0",
     "sinon": "1.15.4",
-    "webpack": "1.9.5",
-    "webpack-dev-server": "1.8.2"
+    "webpack": "1.10.0",
+    "webpack-dev-server": "1.10.1"
   },
   "scripts": {
     "test": "node -e \"require('grunt').cli()\" null sass webpack test",