Update dependency mypy to v1.20.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
mypy (changelog)	==1.19.1 → ==1.20.2

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Release Notes

python/mypy (mypy)

v1.20.2

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v1.20.1

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• Always disable sync in SQLite cache (Ivan Levkivskyi, PR 21184)
• Temporarily skip few base64 tests (Ivan Levkivskyi, PR 21193)
• Revert dict.__or__ typeshed change (Ivan Levkivskyi, PR 21186)
• Fix narrowing for match case with variadic tuples (Shantanu, PR 21192)
• Avoid narrowing type[T] in type calls (Shantanu, PR 21174)
• Fix regression for catching empty tuple in except (Shantanu, PR 21153)
• Fix reachability for frozenset and dict view narrowing (Shantanu, PR 21151)
• Fix narrowing with chained comparison (Shantanu, PR 21150)
• Avoid narrowing to unreachable at module level (Shantanu, PR 21144)
• Allow dangerous identity comparisons to Any typed variables (Shantanu, PR 21142)
• --warn-unused-config should not be a strict flag (Ivan Levkivskyi, PR 21139)

v1.20.0

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[radarhere]

I manually triggered this PR because I knew that Lint would initially fail, needing fixes, and wanted to keep it separate from the rest of Renovate's updates.

[renovate]

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[radarhere]

#9536 should fix the remaining Lint error, and #9596 should fix the unrelated PyPy errors.