bpo-46494: Mention the typing_extensions pkg in typing docs (GH-31260)

(cherry picked from commit 8debeed307)

Co-authored-by: Meer Suri <46469858+meersuri@users.noreply.github.com>
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Miss Islington (bot) 2022-03-07 20:29:09 -08:00 committed by GitHub
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@ -32,6 +32,10 @@ In the function ``greeting``, the argument ``name`` is expected to be of type
:class:`str` and the return type :class:`str`. Subtypes are accepted as
arguments.
New features are frequently added to the ``typing`` module.
The `typing_extensions <https://pypi.org/project/typing-extensions/>`_ package
provides backports of these new features to older versions of Python.
.. _relevant-peps:
Relevant PEPs