Enable more strict Mypy settings #1046

Job	Run time
mypy	32s
ruff	8s
sdist	2m 46s
parse_sdl (macos-latest, 3.2.10)	27s
parse_sdl (windows-latest, 3.2.10)	35s
tox (ubuntu-latest)	4m 6s
build (windows-latest, pypy-3.10, x64)	3m 36s
build (ubuntu-latest, pypy-3.10, x64)	6m 56s
build-macos (pp310-*)	1m 2s
build (windows-latest, 3.10, x64)	2m 43s
build-macos (cp310-*_universal2)	45s
test-docs	5m 2s
linux-wheels (aarch64, pp310-manylinux*)	1m 11s
tox (windows-latest)	1m 25s
linux-wheels (x86_64, cp310-manylinux*)	55s
build (ubuntu-latest, 3.10, x64)	6m 28s
build (windows-latest, pypy-3.10, x86)	4m 1s
linux-wheels (x86_64, pp310-manylinux*)	54s
build (windows-latest, 3.10, x86)	3m 30s
linux-wheels (aarch64, cp310-manylinux*)	1m 11s
publish	0s
	48m 13s

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