Bump langium from 3.5.0 to 4.2.0

Bumps [langium](https://github.com/eclipse-langium/langium/tree/HEAD/packages/langium) from 3.5.0 to 4.2.0.
- [Release notes](https://github.com/eclipse-langium/langium/releases)
- [Changelog](https://github.com/eclipse-langium/langium/blob/main/packages/langium/CHANGELOG.md)
- [Commits](https://github.com/eclipse-langium/langium/commits/HEAD/packages/langium)

---
updated-dependencies:
- dependency-name: langium
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]