chore(package): update url-loader to version 3.0.0

Closes #42

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
     "ts-node": "^1.7.2",
     "tslint": "^4.0.2",
     "typescript": "^2.1.4",
-    "url-loader": "^0.5.7",
+    "url-loader": "^3.0.0",
     "webpack": "^1.13.0",
     "webpack-dev-middleware": "^1.6.1",
     "webpack-hot-middleware": "^2.10.0",