Update itertools requirement from 0.12.0 to 0.13.0

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@v0.12.0...v0.13.0)

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

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

Cargo.toml

@@ -13,7 +13,7 @@ approx = "0.5.1"
 atomic_float = "0.1.0"
 crossbeam = "0.8.2"
 fixed = "1.11.0"
-itertools = "0.12.0" 
+itertools = "0.13.0" 
 rand = "0.8.5"
 rustfft = {version = "6.1.0", features = ["avx", "sse", "neon"] }