Bump async-trait from 0.1.37 to 0.1.38 (#306)

Bumps [async-trait](https://github.com/dtolnay/async-trait) from 0.1.37 to 0.1.38.
- [Release notes](https://github.com/dtolnay/async-trait/releases)
- [Commits](https://github.com/dtolnay/async-trait/compare/0.1.37...0.1.38)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Svyatoslav Nikolsky <svyatonik@gmail.com>