Prepare 19.3.1 release. #1254

Job	Run time
mypy	29s
ruff	7s
sdist	2m 22s
parse_sdl (macos-latest, 3.2.16)	21s
parse_sdl (windows-latest, 3.2.16)	39s
test-docs	3m 31s
build (windows-latest, pypy-3.10, x64)	3m 28s
tox (ubuntu-latest)	3m 47s
build (ubuntu-latest, 3.10, x64)	6m 11s
build (windows-latest, 3.10, x64)	2m 41s
build (windows-latest, 3.10, x86)	4m 9s
linux-wheels (x86_64, pp310-manylinux*)	3m 27s
build (ubuntu-latest, pypy-3.10, x64)	5m 21s
linux-wheels (x86_64, cp310-manylinux*)	4m 4s
build (windows-latest, pypy-3.10, x86)	3m 55s
linux-wheels (aarch64, cp310-manylinux*)	4m 21s
build-macos (cp310-*_universal2)	1m 54s
pyodide	4m 5s
linux-wheels (aarch64, pp310-manylinux*)	3m 33s
build-macos (pp310-*)	3m 55s
publish	0s
	1h 2m 20s

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