deps: update dependency typing-extensions to v4.3.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
typing-extensions (changelog)	==4.1.1 -> ==4.3.0

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Release Notes

python/typing_extensions

v4.3.0

Compare Source

• Add typing_extensions.NamedTuple, allowing for generic NamedTuples on
  Python <3.11 (backport from python/cpython#​92027, by Serhiy Storchaka). Patch
  by Alex Waygood (@​AlexWaygood).
• Adjust typing_extensions.TypedDict to allow for generic TypedDicts on
  Python <3.11 (backport from python/cpython#​27663, by Samodya Abey). Patch by
  Alex Waygood (@​AlexWaygood).

v4.2.0

Compare Source

• Re-export typing.Unpack and typing.TypeVarTuple on Python 3.11.
• Add ParamSpecArgs and ParamSpecKwargs to __all__.
• Improve "accepts only single type" error messages.
• Improve the distributed package. Patch by Marc Mueller (@​cdce8p).
• Update typing_extensions.dataclass_transform to rename the
  field_descriptors parameter to field_specifiers and accept
  arbitrary keyword arguments.
• Add typing_extensions.get_overloads and
  typing_extensions.clear_overloads, and add registry support to
  typing_extensions.overload. Backport from python/cpython#​89263.
• Add typing_extensions.assert_type. Backport from bpo-46480.
• Drop support for Python 3.6. Original patch by Adam Turner (@​AA-Turner).

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