build(deps): bump async-trait from 0.1.49 to 0.1.50
Bumps [async-trait](https://github.com/dtolnay/async-trait) from 0.1.49 to 0.1.50.
- [Release notes](https://github.com/dtolnay/async-trait/releases)
- [Commits](https://github.com/dtolnay/async-trait/compare/0.1.49...0.1.50)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>