build(deps): bump crossbeam-channel from 0.4.2 to 0.4.3
Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.4.2 to 0.4.3. - [Release notes](https://github.com/crossbeam-rs/crossbeam/releases) - [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md) - [Commits](crossbeam-rs/crossbeam@v0.4.2...crossbeam-channel-0.4.3) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
