build(deps): bump phpgt/async from 1.0.1 to 1.0.2 (#685)

Bumps [phpgt/async](https://github.com/phpgt/Async) from 1.0.1 to 1.0.2.
- [Release notes](https://github.com/phpgt/Async/releases)
- [Commits](phpgt/Async@v1.0.1...v1.0.2)

---
updated-dependencies:
- dependency-name: phpgt/async
  dependency-version: 1.0.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]