chore(package): update webpack to version 2.6.1

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "tslint-loader": "3.5.3",
     "typedoc": "0.7.1",
     "typescript": "2.3.3",
-    "webpack": "2.6.0"
+    "webpack": "2.6.1"
   },
   "scripts": {
     "test": "karma start karma.conf.js",