Update crossbeam-channel requirement from 0.4 to 0.5 (#102)

Updates the requirements on [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) to permit the latest version.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-channel-0.4.0...crossbeam-channel-0.5.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

metrics-exporter-tcp/Cargo.toml

@@ -19,7 +19,7 @@ keywords = ["metrics", "telemetry", "tcp"]
 metrics = { version = "0.13.0-alpha.1", path = "../metrics", features = ["std"] }
 metrics-util = { version = "0.4.0-alpha.1", path = "../metrics-util" }
 bytes = "0.5"
-crossbeam-channel = "0.4"
+crossbeam-channel = "0.5"
 prost = "0.6"
 prost-types = "0.6"
 mio = { version = "0.7", features = ["os-poll", "tcp"] }

metrics-observer/Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT"
 [dependencies]
 getopts = "0.2"
 bytes = "0.5"
-crossbeam-channel = "0.4"
+crossbeam-channel = "0.5"
 prost = "0.6"
 prost-types = "0.6"
 tui = "0.12"