build(deps-dev): bump phpunit/phpunit from 8.5.5 to 8.5.8
build(deps-dev): bump phpunit/phpunit from 8.5.5 to 8.5.8

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 8.5.5 to 8.5.8.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-8.5.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/compare/8.5.5...8.5.8)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
editorconfig-checker/editorconfig-checker.php,editorconfig-checker/editorconfig-checker.php