Bump version to 4.2.3 #86

Job	Run time
macos (macos-latest, x86_64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	2m 22s
macos (macos-latest, aarch64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	2m 54s
windows (windows-latest, x64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	1m 33s
build sdist	23s
musllinux (ubuntu-latest, aarch64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	3m 59s
musllinux (ubuntu-latest, x86_64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	3m 41s
musllinux (ubuntu-latest, armv7, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	3m 21s
musllinux (ubuntu-latest, x86, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	3m 27s
linux (ubuntu-latest, s390x, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	37s
linux (ubuntu-latest, ppc64le, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	3m 48s
linux (ubuntu-latest, armv7, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11)	35s
windows (windows-latest, x86, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t)	1m 29s
linux (ubuntu-latest, x86_64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11, --features mimalloc)	37s
linux (ubuntu-latest, x86, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11, --features mimalloc)	37s
linux (ubuntu-latest, aarch64, 3.10 3.11 3.12 3.13 3.13t 3.14 3.14t pypy3.11, --features mimalloc...	37s
release	0s
	30m 0s

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