Update itertools requirement from 0.11.0 to 0.12.0 (#2255)

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](https://github.com/rust-itertools/itertools/compare/v0.11.0...v0.12.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -49,7 +49,7 @@ smallvec = "1.8.0"
 rayon = "1.5.2"
 lru = "0.12.0"
 fastdivide = "0.4.0"
-itertools = "0.11.0"
+itertools = "0.12.0"
 measure_time = "0.8.2"
 async-trait = "0.1.53"
 arc-swap = "1.5.0"

columnar/Cargo.toml

@@ -9,7 +9,7 @@ description = "column oriented storage for tantivy"
 categories = ["database-implementations", "data-structures", "compression"]
 
 [dependencies]
-itertools = "0.11.0"
+itertools = "0.12.0"
 fnv = "1.0.7"
 fastdivide = "0.4.0"