fix: compatibility with mypy==1.7.0 (backport #1271)

[mergify[bot]]

This is an automatic backport of pull request #1271 done by Mergify.

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[coveralls]

Pull Request Test Coverage Report for Build 6850810370

• 9 of 9 (100.0%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.75%

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Totals
Change from base Build 6815162665:	0.0%
Covered Lines:	8708
Relevant Lines:	10038

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💛 - Coveralls