Bump loader-utils, webpack-cli and resolve-url-loader

Bumps [loader-utils](https://github.com/webpack/loader-utils) to 1.4.2 and updates ancestor dependencies [loader-utils](https://github.com/webpack/loader-utils), [webpack-cli](https://github.com/webpack/webpack-cli) and [resolve-url-loader](https://github.com/bholloway/resolve-url-loader/tree/HEAD/packages/resolve-url-loader). These dependencies need to be updated together.


Updates `loader-utils` from 1.4.0 to 1.4.2
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v1.4.2/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v1.4.0...v1.4.2)

Updates `webpack-cli` from 3.3.11 to 3.3.12
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.11...v3.3.12)

Updates `resolve-url-loader` from 3.1.1 to 5.0.0
- [Release notes](https://github.com/bholloway/resolve-url-loader/releases)
- [Changelog](https://github.com/bholloway/resolve-url-loader/blob/v5/packages/resolve-url-loader/CHANGELOG.md)
- [Commits](https://github.com/bholloway/resolve-url-loader/commits/5.0.0/packages/resolve-url-loader)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
- dependency-name: webpack-cli
  dependency-type: indirect
- dependency-name: resolve-url-loader
  dependency-type: direct:development
...

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

package.json

@@ -14,7 +14,7 @@
         "cross-env": "^7.0",
         "laravel-mix": "^5.0.1",
         "lodash": "^4.17.13",
-        "resolve-url-loader": "^3.1.0",
+        "resolve-url-loader": "^5.0.0",
         "sass": "^1.15.2",
         "sass-loader": "^8.0.0"
     }