Update itertools requirement from 0.13.0 to 0.14.0

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...v0.14.0)

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

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

Author: dependabot[bot]

git-function-history-gui/Cargo.toml

@@ -24,4 +24,4 @@ simple_file_logger = "0.4.1"
 log = "0.4.22"
 image = "0.25.2"
 function-grep = { version = "0.1.1", path = "../function-grep" }
-itertools = "0.13.0"
+itertools = "0.14.0"