Update itertools requirement from 0.13 to 0.14

Updates the requirements on [itertools](https://github.com/rust-itertools/itertools) to permit the latest version.
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](rust-itertools/itertools@v0.13.0...v0.13.0)

---
updated-dependencies:
- dependency-name: itertools
  dependency-type: direct:production
...

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

Cargo.toml

@@ -27,7 +27,7 @@ env_logger = "0.11"
 heck = "0.5"
 hex = "0.4"
 if_chain = "1.0"
-itertools = "0.13"
+itertools = "0.14"
 log = "0.4"
 mio = { version = "1.0", features = ["os-ext", "os-poll"] }
 num_cpus = "1.16"