update karma deps to work with webpack 2

package.json

@@ -42,10 +42,10 @@
     "istanbul": "^0.4.5",
     "jasmine-core": "^2.5.2",
     "jasmine-jquery": "^2.1.1",
-    "karma": "^1.3.0",
+    "karma": "^1.4.1",
     "karma-jasmine": "^1.1.0",
     "karma-phantomjs-launcher": "^1.0.2",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^1.8.0"
+    "karma-webpack": "^2.0.2"
   }
 }