Bump tokio-sync from 0.1.6 to 0.1.7 (#301)
Bump tokio-sync from 0.1.6 to 0.1.7 (#301)

Bumps [tokio-sync](https://github.com/tokio-rs/tokio) from 0.1.6 to 0.1.7.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-sync-0.1.6...tokio-sync-0.1.7)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alex/otp-cop