chore(package): update resolve-url-loader to version 2.0.3

Closes #28

Author: greenkeeper[bot]

package.json

@@ -94,7 +94,7 @@
     "parse5": "^3.0.1",
     "postcss-loader": "^1.0.0",
     "raw-loader": "0.5.1",
-    "resolve-url-loader": "^1.4.3",
+    "resolve-url-loader": "^2.0.3",
     "rimraf": "~2.5.4",
     "sass-loader": "^5.0.0",
     "script-ext-html-webpack-plugin": "^1.5.0",