Update dependency mypy to v1.20.2 #804

Job	Run time
Shellcheck	5s
Ruff check and force	8s
Check commit	42s
Run pytest using Python 3.13	22s
Run pytest using Python 3.14	14s
Run mypy	28s
Process test coverage	17s
Process test complexity	10s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
	2m 36s

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