Update phpunit/phpunit requirement from ^8.2 to ^8.3
Update phpunit/phpunit requirement from ^8.2 to ^8.3

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-8.3.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/compare/8.2.0...8.3.5)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
lcobucci/di-builder