build(deps): bump indexmap from 1.8.2 to 1.9.1

[dependabot]

Depends-On: #4676

This PR will need a @dependabot recreate after the other PR merges.

Bumps indexmap from 1.8.2 to 1.9.1.

Changelog

Sourced from indexmap's changelog.

• 1.9.1

  • The MSRV now allows Rust 1.56.0 as well. However, currently hashbrown 0.12.1 requires 1.56.1, so users on 1.56.0 should downgrade that to 0.12.0 until there is a later published version relaxing its requirement.

• 1.9.0

  • MSRV: Rust 1.56.1 or later is now required.

  • The hashbrown dependency has been updated to version 0.12.

  • IterMut and ValuesMut now implement Debug.

  • The new IndexMap::shrink_to and IndexSet::shrink_to methods shrink the capacity with a lower bound.

  • The new IndexMap::move_index and IndexSet::move_index methods change the position of an item from one index to another, shifting the items between to accommodate the move.

Commits

• a638b99 Merge pull request #233 from cuviper/release-1.9.1
• 3f6cdde Release 1.9.1
• 3f8381a Run CI on 1.56.1 until next hashbrown release
• 24a0c8f Revert "Bump MSRV to 1.56.1, matching hashbrown as of 0.12.1"
• 844750f Fix the RELEASES.md link
• 3222203 Merge pull request #231 from cuviper/release-1.9.0
• 9eda24a Add a release note for move_index
• 8d02160 Use u8 test indices so quickcheck is less likely to go out of bounds.
• be700ef Add move_index to change the position of an entry
• 511280a Add an MSRV note for retain_mut
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #4671 (a20233a) into main (83aa42e) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4671      +/-   ##
==========================================
- Coverage   78.87%   78.79%   -0.09%     
==========================================
  Files         304      304              
  Lines       37506    37506              
==========================================
- Hits        29583    29551      -32     
- Misses       7923     7955      +32     

[dconnolly]

There is an addition of unsafe but only after an assert to check the bounds of that's being done inside that block:

[dconnolly]

LGTM with the note about the safely checked usage of unsafe, currently blocked from merging until config change tests are merged

[dconnolly]

@mergify update

[mergify]

update

✅ Branch has been successfully updated

[teor2345]

@dependabot recreate

[teor2345]

Re-approving with new dependency usage from main