Bump wyrihaximus/async-test-utilities from 2.0.0 to 2.1.0

Bumps [wyrihaximus/async-test-utilities](https://github.com/WyriHaximus/php-async-test-utilities) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/WyriHaximus/php-async-test-utilities/releases)
- [Commits](WyriHaximus/php-async-test-utilities@2.0.0...2.1.0)

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Author: dependabot-preview[bot]