Bump wyrihaximus/async-test-utilities from 3.1.0 to 3.3.1

Bumps [wyrihaximus/async-test-utilities](https://github.com/WyriHaximus/php-async-test-utilities) from 3.1.0 to 3.3.1.
- [Release notes](https://github.com/WyriHaximus/php-async-test-utilities/releases)
- [Commits](WyriHaximus/php-async-test-utilities@3.1.0...3.3.1)

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