Update itertools requirement from 0.11 to 0.12

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@v0.11.0...v0.12.0)

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

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

Cargo.toml

@@ -14,7 +14,7 @@ categories = ["algorithms", "computer-vision", "no-std", "science", "science::ro
 nalgebra = {version="0.32", default-features=false, features=["libm"]}
 approx = {version="0.5", default-features=false}
 num-iter = {version="0.1.40", default-features=false, optional=true}
-itertools = {version="0.11", default-features=false}
+itertools = {version="0.12", default-features=false}
 serde = {version="1.0", default-features=false, features=["derive"], optional=true}
 
 [dev-dependencies]