Bump version to 0.5.2 #575

Job	Run time
macos-aarch64	12m 6s
sdist	9m 19s
macos-x86_64	11m 18s
windows (x86_64-pc-windows-msvc, x64)	17m 23s
windows (i686-pc-windows-msvc, x86)	18m 7s
linux (x86_64-unknown-linux-gnu)	9m 46s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 4s
linux (i686-unknown-linux-gnu)	14m 6s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	10m 52s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	11m 6s
linux-s390x (s390x-unknown-linux-gnu, s390x)	15m 21s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 17s
linux-arm (arm-unknown-linux-musleabihf, arm)	10m 9s
musllinux (x86_64-unknown-linux-musl)	9m 45s
musllinux (i686-unknown-linux-musl)	9m 31s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 59s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	10m 13s
musllinux-cross (powerpc64le-unknown-linux-musl, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16, nightly)	8m 25s
	3h 29m 47s

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