Bump im from 10.2.0 to 12.3.0

[dependabot-preview]

Bumps im from 10.2.0 to 12.3.0.

Release notes

Sourced from im's releases.

12.3.0

Added

• singleton methods have been deprecated and renamed to unit.
• Vector::chunks and Vector::chunks_mut have been deprecated and renamed to leaves and leaves_mut to avoid confusion with Vec::chunks. (#50)

Fixed

• Fixed an issue where the HashMap draining iterator might access uninitialised memory leading to undefined behaviour. (#60)
• Fixed multiple issues in Vector::split_off and Vector::append that would cause lookup errors and unexpectedly unbalanced trees. (#55).

12.2.0

Added

• OrdMap and OrdSet now have a range() method which makes an iterator over a bounded subset of the values. The improved iterator implementation is also considerably more efficient than the previous (about an order of magnitude faster for nontrivial data sets). iter() has been updated to take advantage of this, and is now just an alias for range(..). (#27)
• FocusMut now has an unmut method to turn it into an immutable Focus, releasing its exclusive hold on the underlying Vector.
• Focus now implements Clone.

12.1.0

Added

• Maps and sets now have the clear method just like Vector. (#46)

Changed

• Single chunk Vectors are no longer allocated directly on the stack, meaning that they're now comparable in performance to std::vec::Vec rather than slightly faster, but they also won't eat up your stack space quite as quickly, and they'll clone without copying and share structure with clones as you'd expect.

12.0.0

Starting with this release, the arc flag is gone, in favour of publishing im as two separate crates: im (using Arc) and im-rc (using Rc). They're identical (and built from the same code), except that im is thread safe and im-rc is a little bit more performant.

This is a major release as a consequence, but there should be no breaking code changes other than the new default choice of reference counter.

Added

• The Chunk datatype that's used to build Vector and OrdMap has been exposed and made generally usable. It's somewhere between a GenericArray and a ring buffer, offers O(1)* push in either direction, and is generally hyperoptimised for its purpose of serving as nodes for Bagwell tries, but it's also a powered up version of GenericArray that might be useful to others, hence the public API.
• Vector now has Focus and FocusMut APIs for caching index lookups, yielding huge performance gains when performing multiple adjacent index lookups. Vector::iter has been reimplemented using this API, and is now much simpler and about twice as fast as a result, and Vector::iter_mut now runs nearly an order of magnitude faster. Likewise, Vector::sort and Vector::retain are now using FocusMut and run considerably faster as a result.
• Focus and FocusMut can also be used as stand ins for subslices through the narrow and split_at methods. You can also iterate over foci, making this the most efficient way to iterate over a subset of a Vector.
• Vector now implements Rayon's parallel iterators behind the rayon feature flag.

Changed

• As std::ops::RangeBounds is now stabilised in Rust 1.28, the Vector::slice method is now unconditionally available on the stable channel.
• Union/difference/intersection/is_submap methods on HashMap and OrdMap that take functions now take FnMut instead of Fn. This should not affect any existing code. (#34)
• Vector::split_off can now take an index equal to the length of the vector, yielding an empty vector as the split result. (#33)
• Vector::set now returns the replaced value.

Fixed

• Vector is now represented as a single inline chunk until it grows larger than the chunk size, making it even faster than Vec at small sizes, though clone could now be slower if the clone is expensive (it's still absurdly fast for A: Copy).

11.0.1

Fixed

• Various performance improvements, amounting to a 5-10% speedup for both kinds of map/set.
• Fixed an edge case bug in sort::quicksort.

11.0.0

... (truncated)

Changelog

Sourced from im's changelog.

[12.3.0] - 2019-01-15

Added

• singleton methods have been deprecated and renamed to unit.
• Vector::chunks and Vector::chunks_mut have been deprecated and renamed to
  leaves and leaves_mut to avoid confusion with Vec::chunks. (#50)

Fixed

• Fixed an issue where the HashMap draining iterator might access uninitialised memory leading to
  undefined behaviour. (#60)
• Fixed multiple issues in Vector::split_off and Vector::append that would cause lookup errors
  and unexpectedly unbalanced trees. (#55).

[12.2.0] - 2018-10-12

Added

• OrdMap and OrdSet now have a range() method which makes an iterator over
  a bounded subset of the values. The improved iterator implementation is also
  considerably more efficient than the previous (about an order of magnitude
  faster for nontrivial data sets). iter() has been updated to take advantage
  of this, and is now just an alias for range(..). (#27)
• FocusMut now has an unmut method to turn it into an immutable Focus,
  releasing its exclusive hold on the underlying Vector.
• Focus now implements Clone.

[12.1.0] - 2018-09-25

Added

• Maps and sets now have the clear method just like Vector. (#46)

Changed

• Single chunk Vectors are no longer allocated directly on the stack, meaning
  that they're now comparable in performance to std::vec::Vec rather than
  slightly faster, but they also won't eat up your stack space quite as quickly,
  and they'll clone without copying and share structure with clones as you'd
  expect.

[12.0.0] - 2018-08-30

Starting with this release, the arc flag is gone, in favour of publishing im
as two separate crates: im (using Arc) and im-rc (using Rc). They're
identical (and built from the same code), except that im is thread safe and
im-rc is a little bit more performant.

This is a major release as a consequence, but there should be no breaking code
changes other than the new default choice of reference counter.

Added

... (truncated)

Commits

• c901d48 (cargo-release) version 12.3.0
• fc4d1aa Update changelog for release.
• 6990c68 Sync rc/Cargo.toml.
• 8fefc93 Use an absolute link for the Code of Conduct.
• fa46c0f Scoped lints appear to work on stable now; remove conditionals.
• 75d856f Simplified draining iterators for SparseChunk and hamt::Node.
• 5ca2911 A test for Bitmap.
• cb431a6 Many Vector merging/splitting bug fixes.
• da13ed1 Add a Debug implementation for Side.
• 4094cff Update quickcheck requirement from 0.7 to 0.8
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #21.