Update webpack devDependency

Author: jhnns

package.json

@@ -45,7 +45,7 @@
     "raw-loader": "^0.5.1",
     "should": "^7.0.2",
     "style-loader": "^0.12.3",
-    "webpack": "^1.4.0",
+    "webpack": "^1.11.0",
     "webpack-dev-server": "^1.7.0"
   }
 }