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/12.3.0/ChangeLog-12.3.md) - [Commits](https://github.com/sebastianbergmann/phpunit/compare/9.0.0...12.3.0) --- updated-dependencies: - dependency-name: phpunit/phpunit dependency-version: 12.3.0 dependency-type: direct:development ... Signed-off-by: dependabot[bot] <support@github.com>