Update indexmap requirement from 1.9 to 2.0

[dependabot]

Updates the requirements on indexmap to permit the latest version.

Changelog

Sourced from indexmap's changelog.

• 1.9.3

  • Bump the rustc-rayon dependency, for compiler use only.

• 1.9.2

  • IndexMap and IndexSet both implement arbitrary::Arbitrary<'_> and quickcheck::Arbitrary if those optional dependency features are enabled.

• 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.

• 1.8.2

  • Bump the rustc-rayon dependency, for compiler use only.

• 1.8.1

  • The new IndexSet::replace_full will return the index of the item along with the replaced value, if any, by @​zakcutner in PR 222.

• 1.8.0

  • The new IndexMap::into_keys and IndexMap::into_values will consume the map into keys or values, respectively, matching Rust 1.54's HashMap methods, by @​taiki-e in PR [195].

  • More of the iterator types implement Debug, ExactSizeIterator, and FusedIterator, by @​cuviper in PR [196].

... (truncated)

Commits

• 861fad7 Merge pull request #259 from cuviper/indexmap-1-rustc-rayon-0.5
• 3413435 Release 1.9.3
• 6c67000 Update rustc-rayon to 0.5
• 4d52cf3 Merge pull request #247 from cuviper/arbitrary-1.x
• 4d41050 Release 1.9.2
• bc1a12f Add an Arbitrary release note
• 2251812 impl Arbitrary for IndexMap and IndexSet
• fe98ec2 Revert "Run CI on 1.56.1 until next hashbrown release"
• a638b99 Merge pull request #233 from cuviper/release-1.9.1
• 3f6cdde Release 1.9.1
• Additional commits viewable in compare view

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[juntyr]

Superseded by #459

[dependabot]

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