Prepare 19.3.1 release. #1253

Job	Run time
ruff	7s
mypy	32s
sdist	3m 58s
parse_sdl (macos-latest, 3.2.16)	24s
parse_sdl (windows-latest, 3.2.16)	45s
test-docs	4m 16s
build (ubuntu-latest, 3.10, x64)	5m 22s
build (windows-latest, 3.10, x64)	2m 43s
build (ubuntu-latest, pypy-3.10, x64)	4m 31s
build (windows-latest, pypy-3.10, x64)	3m 40s
build (windows-latest, pypy-3.10, x86)	3m 39s
build (windows-latest, 3.10, x86)	4m 28s
tox (ubuntu-latest)	3m 37s
pyodide	3m 47s
build-macos (cp310-*_universal2)	1m 57s
build-macos (pp310-*)	3m 40s
linux-wheels (x86_64, pp310-manylinux*)	3m 30s
linux-wheels (aarch64, pp310-manylinux*)	3m 39s
linux-wheels (x86_64, cp310-manylinux*)	4m 12s
linux-wheels (aarch64, cp310-manylinux*)	4m 8s
publish	40s
	1h 3m 35s

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