Bump lock_api from 0.4.3 to 0.4.4
Bumps [lock_api](https://github.com/Amanieu/parking_lot) from 0.4.3 to 0.4.4.
- [Release notes](https://github.com/Amanieu/parking_lot/releases)
- [Changelog](https://github.com/Amanieu/parking_lot/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Amanieu/parking_lot/compare/lock_api-0.4.3...lock_api-0.4.4)
Signed-off-by: dependabot[bot] <support@github.com>