Typing-extensions

This feature release provides improvements to various recently
added features, most importantly type parameter defaults (PEP 696).

There are no changes since 4.11.0rc1.

- Fix tests on Python 3.13.0a5. Patch by Jelle Zijlstra.
- Fix the runtime behavior of type parameters with defaults (PEP 696).
Patch by Nadir Chowdhury.
- Fix minor discrepancy between error messages produced by `typing`
and `typing_extensions` on Python 3.10. Patch by Jelle Zijlstra.
- When `include_extra=False`, `get_type_hints()` now strips `ReadOnly` from the annotation.

This feature release adds support for PEP 728 (TypedDict with extra
items) and PEP 742 (``TypeIs``).

There are no changes since 4.10.0rc1.

- Add support for PEP 728, supporting the `closed` keyword argument and the
special `__extra_items__` key for TypedDict. Patch by Zixuan James Li.
- Add support for PEP 742, adding `typing_extensions.TypeIs`. Patch
by Jelle Zijlstra.
- Drop runtime error when a read-only `TypedDict` item overrides a mutable
one. Type checkers should still flag this as an error. Patch by Jelle
Zijlstra.
- Speedup `issubclass()` checks against simple runtime-checkable protocols by
around 6% (backporting https://github.com/python/cpython/pull/112717, by Alex
Waygood).
- Fix a regression in the implementation of protocols where `typing.Protocol`
classes that were not marked as `runtime_checkable` would be unnecessarily
introspected, potentially causing exceptions to be raised if the protocol had
problematic members. Patch by Alex Waygood, backporting
https://github.com/python/cpython/pull/113401.

This feature release adds `typing_extensions.ReadOnly`, as specified
by PEP 705, and makes various other improvements, especially to
`typing_extensions.deprecated()`.

There are no changes since 4.9.0rc1.

- Add support for PEP 705, adding `typing_extensions.ReadOnly`. Patch
by Jelle Zijlstra.
- All parameters on `NewType.__call__` are now positional-only. This means that
the signature of `typing_extensions.NewType.__call__` now exactly matches the
signature of `typing.NewType.__call__`. Patch by Alex Waygood.
- Fix bug with using `deprecated` on a mixin class. Inheriting from a
deprecated class now raises a `DeprecationWarning`. Patch by Jelle Zijlstra.
- `deprecated` now gives a better error message if you pass a non-`str`
argument to the `msg` parameter. Patch by Alex Waygood.
- `deprecated` is now implemented as a class for better introspectability.
Patch by Jelle Zijlstra.
- Exclude `__match_args__` from `Protocol` members.
Backport of https://github.com/python/cpython/pull/110683 by Nikita Sobolev.
- When creating a `typing_extensions.NamedTuple` class, ensure `__set_name__`
is called on all objects that define `__set_name__` and exist in the values
of the `NamedTuple` class's class dictionary. Patch by Alex Waygood,
backporting https://github.com/python/cpython/pull/111876.
- Improve the error message when trying to call `issubclass()` against a
`Protocol` that has non-method members. Patch by Alex Waygood (backporting
https://github.com/python/cpython/pull/112344, by Randolph Scholz).