Bump json5, @microsoft/sp-webpart-base and loader-utils

Bumps [json5](https://github.com/json5/json5) to 2.2.3 and updates ancestor dependencies [json5](https://github.com/json5/json5), [@microsoft/sp-webpart-base](http://aka.ms/spfx) and [loader-utils](https://github.com/webpack/loader-utils). These dependencies need to be updated together.


Updates `json5` from 0.5.1 to 2.2.3
- [Release notes](https://github.com/json5/json5/releases)
- [Changelog](https://github.com/json5/json5/blob/main/CHANGELOG.md)
- [Commits](json5/json5@v0.5.1...v2.2.3)

Updates `@microsoft/sp-webpart-base` from 1.15.2 to 1.17.1

Updates `loader-utils` from 1.1.0 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](webpack/loader-utils@v1.1.0...v1.4.2)

---
updated-dependencies:
- dependency-name: json5
  dependency-type: indirect
- dependency-name: "@microsoft/sp-webpart-base"
  dependency-type: direct:production
- dependency-name: loader-utils
  dependency-type: indirect
...

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Author: dependabot[bot]