Chore(deps): Update cattrs requirement from <26 to <27

[dependabot]

Updates the requirements on cattrs to permit the latest version.

Release notes

Sourced from cattrs's releases.

v26.1.0

• Add the tomllib preconf converter. See here for details. (#716)
• Customizing un/structuring of attrs classes, dataclasses, TypedDicts and dict NamedTuples is now possible by using Annotated[T, override()] on fields. See here for more details. (#717)
• Fix structuring of nested generic classes with stringified annotations. (#688)
• Python 3.9 is no longer supported, as it is end-of-life. Use previous versions on this Python version. (#698)
• Apply the attrs converter to the default value before checking if it is equal to the attribute's value, when omit_if_default is true and an attrs converter is specified. (#696)
• Use the optional _value_ type hint to structure and unstructure enums if present. (#699)
• Aliases (when in use) now properly generate rename metadata in generated hooks. (#706 #710)
• cattrs now tracks performance using codspeed. (#703)
• The tomlkit preconf converter now properly handles native date objects when structuring. (#707 #708)
• The tomlkit preconf converter now passes date objects directly to tomlkit for unstructuring. (#707 #708)
• Enum handling has been optimized by switching to hook factories, improving performance especially for plain enums. (#705)
• Fix cattrs.strategies.include_subclasses when used with cattrs.strategies.configure_tagged_union and classes using diamond inheritance. (#685 #713)
• Fix cattrs.strategies.configure_tagged_union when used with recursive type aliases. (#678 #714)

New Contributors

• @​calebj made their first contribution in python-attrs/cattrs#688
• @​antony-frolov made their first contribution in python-attrs/cattrs#696
• @​reversefold made their first contribution in python-attrs/cattrs#702

Full Changelog: python-attrs/cattrs@v25.3.0...v26.1.0

Changelog

Sourced from cattrs's changelog.

26.1.0 (2026-02-18)

• Add the {mod}tomllib <cattrs.preconf.tomllib> preconf converter. See here for details. (#716)
• Customizing un/structuring of attrs classes, dataclasses, TypedDicts and dict NamedTuples is now possible by using Annotated[T, override()] on fields. See here for more details. (#717)
• Fix structuring of nested generic classes with stringified annotations. (#688)
• Python 3.9 is no longer supported, as it is end-of-life. Use previous versions on this Python version. (#698)
• Apply the attrs converter to the default value before checking if it is equal to the attribute's value, when omit_if_default is true and an attrs converter is specified. (#696)
• Use the optional _value_ type hint to structure and unstructure enums if present. (#699)
• Aliases (when in use) now properly generate rename metadata in generated hooks. (#706 #710)
• cattrs now tracks performance using codspeed. (#703)
• The {mod}tomlkit <cattrs.preconf.tomlkit> preconf converter now properly handles native date objects when structuring. (#707 #708)
• The {mod}tomlkit <cattrs.preconf.tomlkit> preconf converter now passes date objects directly to tomlkit for unstructuring. (#707 #708)
• Enum handling has been optimized by switching to hook factories, improving performance especially for plain enums. (#705)
• Fix {func}cattrs.strategies.include_subclasses when used with {func}cattrs.strategies.configure_tagged_union and classes using diamond inheritance. (#685 #713)
• Fix {func}cattrs.strategies.configure_tagged_union when used with recursive type aliases. (#678 #714)

25.3.0 (2025-10-07)

• Potentially breaking: Abstract sets are now structured into frozensets. This allows hashability, better immutability and is more consistent with the collections.abc.Set type. See Migrations for steps to restore legacy behavior. (#686)
• Python 3.14 is now supported and part of the test matrix. (#653)
• Fix unstructuring NewTypes with the {class}BaseConverter. (#684)
• Make some Hypothesis tests more robust. (#684)
• {func}cattrs.strategies.include_subclasses now works with generic parent classes and the tagged union strategy. (#683)

25.2.0 (2025-08-31)

• Potentially breaking: Sequences are now structured into tuples. This allows hashability, better immutability and is more consistent with the collections.abc.Sequence type.

... (truncated)

Commits

• fd887b7 v26.1.0
• 6bc4708 Support overrides in annotated attributes (#717)
• 309e9d1 Pin CI references (#716)
• 1ac3ce8 Introduce tomllib (#715)
• 4c20ab7 configure_tagged_unions: fix recursive type aliases (#714)
• 31c19ce Fix include_subclasses + configure_tagged_union when diamond inheritance is...
• 32d0be5 Introduce hook factories for enums (#705)
• 6941413 Generate rename metadata for aliases in generated hooks (#710)
• 08bd8d9 tomlkit: handle native date objects (#708)
• 1a94abf Benchmark enums (#704)
• Additional commits viewable in compare view

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