• 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 python/cpython#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 python/cpython#111876.
• Improve the error message when trying to call issubclass() against a
  Protocol that has non-method members. Patch by Alex Waygood (backporting
  python/cpython#112344, by Randolph Scholz).