chore(deps): bump url-loader from 2.1.0 to 4.1.1 in /ui

Bumps [url-loader](https://github.com/webpack-contrib/url-loader) from 2.1.0 to 4.1.1.
- [Release notes](https://github.com/webpack-contrib/url-loader/releases)
- [Changelog](https://github.com/webpack-contrib/url-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/url-loader@v2.1.0...v4.1.1)

---
updated-dependencies:
- dependency-name: url-loader
  dependency-version: 4.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ui/package-lock.json

@@ -61,7 +61,7 @@
     "tslint-config-prettier": "^1.18.0",
     "tslint-react": "^3.6.0",
     "uglifyjs-webpack-plugin": "2.2.0",
-    "url-loader": "2.1.0",
+    "url-loader": "4.1.1",
     "webpack": "4.38.0",
     "webpack-dev-server": "4.15.2",
     "webpack-manifest-plugin": "2.0.4",