chore(deps): bump xmldom and jsonld-checker

Removes [xmldom](https://github.com/xmldom/xmldom). It's no longer used after updating ancestor dependency [jsonld-checker](https://github.com/gjgd/jsonld-checker/tree/HEAD/packages/lib). These dependencies need to be updated together.


Removes `xmldom`

Updates `jsonld-checker` from 0.1.7 to 0.1.8
- [Release notes](https://github.com/gjgd/jsonld-checker/releases)
- [Changelog](https://github.com/gjgd/jsonld-checker/blob/main/packages/lib/CHANGELOG.md)
- [Commits](https://github.com/gjgd/jsonld-checker/commits/v0.1.8/packages/lib)

---
updated-dependencies:
- dependency-name: xmldom
  dependency-type: indirect
- dependency-name: jsonld-checker
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>