6.5.0

Features

• Replace internal implementation from an array of items to hash table.
  algorithmic complexity for lookups is switched from O(N) to O(1).

  The hash table is very similar to :class:dict from CPython but it allows keys duplication.

  The benchmark shows 25-50% boost for single lookups, x2-x3 for bulk updates, and x20 for
  some multidict view operations. The gain is not for free:
  :class:~multidict.MultiDict.add and :class:~multidict.MultiDict.extend are 25-50%
  slower now. We consider it as acceptable because the lookup is much more common
  operation that addition for the library domain.

  Related issues and pull requests on GitHub:
  #1128.

Contributor-facing changes

• Builds have been added for arm64 Windows
  wheels and the reusable-build-wheel.yml
  template has been modified to allow for
  an os value (windows-11-arm) which
  does not end with the -latest postfix.

  Related issues and pull requests on GitHub:
  #1167.

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