Prepare 20.1.0 release. #1409

Job	Run time
sdist	1m 13s
ruff	11s
mypy	33s
parse_sdl (macos-latest, 3.2.16)	29s
parse_sdl (windows-latest, 3.2.16)	1m 8s
tox (ubuntu-latest)	6m 15s
pyodide	2m 55s
build-macos (cp314t-*_universal2)	2m 45s
test-docs	1m 48s
build-macos (pp310-*)	3m 31s
build-macos (cp310-*_universal2)	2m 7s
linux-wheels (aarch64, cp310-manylinux*)	4m 5s
linux-wheels (x86_64, pp310-manylinux*)	3m 24s
linux-wheels (aarch64, pp310-manylinux*)	3m 51s
linux-wheels (aarch64, cp314t-manylinux*)	4m 6s
linux-wheels (x86_64, cp314t-manylinux*)	4m 10s
linux-wheels (x86_64, cp310-manylinux*)	4m 15s
build (ubuntu-latest, 3.10, x64)	3m 36s
build (windows-latest, pypy-3.10, x64)	4m 2s
build (ubuntu-latest, 3.14t, x64)	3m 43s
build (windows-latest, 3.14t, x86)	3m 56s
build (windows-11-arm, 3.11, arm64)	4m 7s
build (windows-11-arm, 3.14t, arm64)	4m 52s
build (windows-latest, 3.10, x64)	3m 26s
build (windows-latest, 3.10, x86)	3m 40s
build (windows-latest, 3.14t, x64)	3m 29s
build (ubuntu-latest, pypy-3.10, x64)	8m 20s
publish	1m 5s
	1h 31m 2s

Provide feedback