- update to 4.12.2:
* Fix regression in v4.12.0 where specialization of certain
* generics with an overridden `__eq__` method would raise
errors.
* Fix tests so they pass on 3.13.0b2
* Preliminary changes for compatibility with the draft
implementation of PEP 649 in Python 3.14.
* Fix regression in v4.12.0 where nested `Annotated` types
would cause `TypeError` to be raised if the nested
`Annotated` type had unhashable metadata.
* Fix incorrect behaviour of `typing_extensions.ParamSpec` on
Python 3.8 and 3.9 that meant that
`isinstance(typing_extensions.ParamSpec("P"),
typing.TypeVar)` would have a different result in some
situations depending on whether or not a profiling
function had been set using `sys.setprofile`.
* This release focuses on compatibility with the upcoming
release of Python 3.13. Most changes are related to the
implementation of type parameter defaults (PEP 696).