chore(package): update webpack to version 3.4.1

Closes #113

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "tslint-loader": "3.5.3",
     "typedoc": "0.7.1",
     "typescript": "2.4.2",
-    "webpack": "3.3.0"
+    "webpack": "3.4.1"
   },
   "scripts": {
     "test": "karma start karma.conf.js",