Bump loader-utils and resolve-url-loader

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

Updates `loader-utils` from 2.0.2 to 2.0.4
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v2.0.4/CHANGELOG.md)
- [Commits](webpack/loader-utils@v2.0.2...v2.0.4)

Updates `resolve-url-loader` from 3.1.4 to 3.1.5
- [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/3.1.5/packages/resolve-url-loader)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
- dependency-name: resolve-url-loader
  dependency-type: indirect
...

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