Bump api-clients/test-utilities from 5.4.1 to 5.5.0

Bumps [api-clients/test-utilities](https://github.com/php-api-clients/test-utilities) from 5.4.1 to 5.5.0.
- [Release notes](https://github.com/php-api-clients/test-utilities/releases)
- [Commits](php-api-clients/test-utilities@5.4.1...5.5.0)

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

Author: dependabot-support