Bump typing-extensions from 4.0.0 to 4.0.1

Bumps typing-extensions from 4.0.0 to 4.0.1.

Changelog

Sourced from typing-extensions's changelog.

Release 4.0.1 (November 30, 2021)

• Fix broken sdist in release 4.0.0. Patch by Adam Turner (@AA-Turner).
• Fix equality comparison for Required and NotRequired. Patch by Jelle Zijlstra (@jellezijlstra).
• Fix usage of Self as a type argument. Patch by Chris Wesseling (@CharString) and James Hilton-Balfe (@Gobot1234).

Commits

• a237146 prepare release 4.0.1 (#974)
• 0c8e55f Vendor typing._SpecialForm to fool typing._type_check (#966)
• 273fe26 prepare changelog (#969)
• caa9cdf Rename src_py3 to src (#965)
• 28b64f4 Required/NotRequired: fix typo (#962)
• 93a51a6 Update typing-extensions README (#951)
• 97d466f Add Self type to the README of typing-extensions (#942)
• See full diff in compare view

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merged

mentioned in commit 5b1b39c9

mentioned in commit 63b55c6d

mentioned in commit 684dc8a0

mentioned in commit 8f7a90e4