Update Rust crate itertools to 0.12.0

This MR contains the following updates:

Package	Type	Update	Change
itertools	dependencies	minor	0.11.0 -> 0.12.0

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Release Notes

rust-itertools/itertools (itertools)

v0.12.0

Compare Source

Breaking

• Made take_while_inclusive consume iterator by value (#​709)
• Added Clone bound to Unique (#​777)

Added

• Added Itertools::try_len (#​723)
• Added free function sort_unstable (#​796)
• Added GroupMap::fold_with (#​778, #​785)
• Added PeekNth::{peek_mut, peek_nth_mut} (#​716)
• Added PeekNth::{next_if, next_if_eq} (#​734)
• Added conversion into (Option<A>,Option<B>) to EitherOrBoth (#​713)
• Added conversion from Either<A, B> to EitherOrBoth<A, B> (#​715)
• Implemented ExactSizeIterator for Tuples (#​761)
• Implemented ExactSizeIterator for (Circular)TupleWindows (#​752)
• Made EitherOrBoth<T> a shorthand for EitherOrBoth<T, T> (#​719)

Changed

• Added missing #[must_use] annotations on iterator adaptors (#​794)
• Made Combinations lazy (#​795)
• Made Intersperse(With) lazy (#​797)
• Made Permutations lazy (#​793)
• Made Product lazy (#​800)
• Made TupleWindows lazy (#​602)
• Specialized Combinations::{count, size_hint} (#​729)
• Specialized CombinationsWithReplacement::{count, size_hint} (#​737)
• Specialized Powerset::fold (#​765)
• Specialized Powerset::count (#​735)
• Specialized TupleCombinations::{count, size_hint} (#​763)
• Specialized TupleCombinations::fold (#​775)
• Specialized WhileSome::fold (#​780)
• Specialized WithPosition::fold (#​772)
• Specialized ZipLongest::fold (#​774)
• Changed {min, max}_set* operations require alloc feature, instead of std (#​760)
• Improved documentation of tree_fold1 (#​787)
• Improved documentation of permutations (#​724)
• Fixed typo in documentation of multiunzip (#​770)

Notable Internal Changes

• Improved specialization tests (#​799, #​786, #​782)
• Simplified implementation of Permutations (#​739, #​748, #​790)
• Combined Merge/MergeBy/MergeJoinBy implementations (#​736)
• Simplified Permutations::size_hint (#​739)
• Fix wrapping arithmetic in benchmarks (#​770)
• Enforced rustfmt in CI (#​751)
• Disallowed compile warnings in CI (#​720)
• Used cargo hack to check MSRV (#​754)

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