Bump wyrihaximus/async-test-utilities from 2.0.0-alpha1 to 2.0.0-alpha2

Bumps [wyrihaximus/async-test-utilities](https://github.com/WyriHaximus/php-async-test-utilities) from 2.0.0-alpha1 to 2.0.0-alpha2.
- [Release notes](https://github.com/WyriHaximus/php-async-test-utilities/releases)
- [Commits](WyriHaximus/php-async-test-utilities@2.0.0-alpha1...2.0.0-alpha2)

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

Author: dependabot-preview[bot]