chore(package): update url-loader to version 2.3.0

Closes #3433

package.json

@@ -134,7 +134,7 @@
     "source-map-support": "0.3.2",
     "style-loader": "0.12.3",
     "tap": "14.2.0",
-    "url-loader": "2.1.0",
+    "url-loader": "2.3.0",
     "watch": "0.16.0",
     "webpack": "2.7.0",
     "webpack-dev-middleware": "2.0.4",