Bump phpunit/phpunit from 10.0.19 to 10.2.1

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.0.19 to 10.2.1.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.2.1/ChangeLog-10.2.md)
- [Commits](sebastianbergmann/phpunit@10.0.19...10.2.1)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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