Bump mypy from 0.971 to 0.991

[dependabot[bot]]

Bumps mypy from 0.971 to 0.991.

Commits

• b7788fc Update version to remove "+dev" for releasing 0.991
• 6077d19 manually CP typeshed #9130
• ab0ea1e Fix crash with function redefinition (#14064)
• 592a9ce Fix another crash with report generation on namespace packages (#14063)
• 1650ae0 Update --no-warn-no-return docs for empty body changes (#14065)
• b9daa31 Don't ignore errors in files passed on the command line (#14060)
• 02fd8a5 Filter out wasm32 wheel in upload-pypi.py (#14035)
• 131c8d7 Fix crash on inference with recursive alias to recursive instance (#14038)
• 1368338 Change version to 0.991+dev in preparation for the point release
• b71dc3d Remove +dev from version
• Additional commits viewable in compare view

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