Bump crossbeam-channel from 0.5.5 to 0.5.6

Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.5.5 to 0.5.6.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](crossbeam-rs/crossbeam@crossbeam-channel-0.5.5...crossbeam-channel-0.5.6)

---
updated-dependencies:
- dependency-name: crossbeam-channel
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -9,7 +9,7 @@ license = "Apache-2.0"
 clap = "3.0.0-beta.4"
 serde = { version = "1.0.143", features = ["derive"] }
 serde_json = { version = "1.0.91", features = ["preserve_order"] }
-crossbeam-channel = "0.5.5"
+crossbeam-channel = "0.5.6"
 anyhow = "1.0.58"
 log = "0.4.17"
 tracing = "0.1.36"