Build(deps): bump phpgt/dom from 4.1.9 to 4.2.0

Bumps [phpgt/dom](https://github.com/phpgt/Dom) from 4.1.9 to 4.2.0.
- [Release notes](https://github.com/phpgt/Dom/releases)
- [Commits](phpgt/Dom@v4.1.9...v4.2.0)

---
updated-dependencies:
- dependency-name: phpgt/dom
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]