Bump num-traits from 0.2.8 to 0.2.9

Bumps [num-traits](https://github.com/rust-num/num-traits) from 0.2.8 to 0.2.9.
- [Release notes](https://github.com/rust-num/num-traits/releases)
- [Changelog](https://github.com/rust-num/num-traits/blob/master/RELEASES.md)
- [Commits](rust-num/num-traits@num-traits-0.2.8...num-traits-0.2.9)

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

Author: dependabot-preview[bot]

Cargo.lock

@@ -56,7 +56,7 @@ atty = "0.2.13"
 serde = { version = "1.0.102", features = ["derive"] }
 toml = "0.5.5"
 anyhow = "1.0.19"
-num-traits = "0.2.6"
+num-traits = "0.2.9"
 
 [dependencies.tokio]
 version = "0.2.0-alpha.6"