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](https://catt.rs/en/stable/customizing.html#using-...

• 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](https://catt.rs/en/latest/migrations.h...

• Potentially breaking: Sequences are now structured into tuples. This allows hashability, better immutability and is more consistent with the collections.abc.Sequence type. See Migrations for steps to restore legacy behavior. (...

• Fixed AttributeError: no attribute '__parameters__' while structuring attrs classes that inherit from parametrized generic aliases from collections.abc. (#654 #655)

• Potentially breaking: The converters raise StructureHandlerNotFoundError more eagerly (on hook creation, instead of on hook use). This helps surfacing problems with missing hooks sooner. See Migrations for steps to restore legacy behavior. (#577) -...