Bump itertools from 0.11.0 to 0.12.0

Bumps [itertools](https://github.com/rust-itertools/itertools) from 0.11.0 to 0.12.0.
- [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
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -21,7 +21,7 @@ argparse = "0.2.2"
 defaultmap = "0.6.0"
 float-ord = "0.3.2"
 group-by = "1.0.0"
-itertools = "0.11.0"
+itertools = "0.12.0"
 peg = "0.8.2"
 permutation = "0.4.1"
 string-intern = { version ="0.1.7", default-features = false }