fix(package.json): Update dependency url-loader to v4

Author: renovate-bot

package.json

@@ -60,7 +60,7 @@
     "strip-ansi": "6.0.0",
     "style-loader": "0.23.1",
     "uglifyjs-webpack-plugin": "1.3.0",
-    "url-loader": "1.1.2",
+    "url-loader": "4.1.0",
     "webpack": "4.43.0",
     "webpack-dev-server": "3.10.3",
     "webpack-manifest-plugin": "2.2.0",