Bump to 0.20.1. #945

Job	Run time
list	18s
test (tests-3.8)	39s
test (tests-3.9)	38s
test (tests-3.10)	35s
test (tests-pypy3.10)	56s
test (tests-3.11)	45s
test (tests-3.12)	48s
test (tests-3.13)	45s
test (audit)	33s
test (build)	1m 0s
test (style)	21s
test (typing)	35s
test (docs(dirhtml))	46s
test (docs(doctest))	1m 5s
test (docs(linkcheck))	52s
test (docs(man))	52s
test (docs(spelling))	59s
test (docs(style))	36s
macos (x86_64)	1m 41s
macos (aarch64)	1m 41s
manylinux (x86_64)	1m 44s
manylinux (x86)	2m 10s
manylinux (aarch64)	2m 14s
musllinux (aarch64-unknown-linux-musl)	1m 48s
manylinux (armv7)	2m 19s
musllinux (i686-unknown-linux-musl)	1m 42s
manylinux (s390x)	1m 58s
musllinux (x86_64-unknown-linux-musl)	1m 25s
manylinux (ppc64le)	2m 10s
sdist	29s
windows (x64)	5m 53s
windows (x86)	4m 10s
release	0s
	44m 27s

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