chore(package): update url-loader to version 0.6.2

Closes #114

Author: greenkeeper[bot]

package.json

@@ -55,7 +55,7 @@
     "postcss-loader": "^2.0.6",
     "sass-loader": "^6.0.6",
     "style-loader": "^0.18.2",
-    "url-loader": "^0.5.9",
+    "url-loader": "^0.6.2",
     "webpack": "^3.1.0",
     "webpack-dev-server": "^2.5.1",
     "webpack-merge": "^4.1.0"