Bump version to v0.4.7 #484

Job	Run time
macos-x86_64	9m 28s
sdist	7m 24s
linux (x86_64-unknown-linux-gnu)	9m 32s
macos-aarch64	7m 34s
windows (x86_64-pc-windows-msvc, x64)	14m 31s
linux (i686-unknown-linux-gnu)	9m 37s
windows (i686-pc-windows-msvc, x86)	16m 17s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	8m 55s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le)	8m 52s
linux-s390x (s390x-unknown-linux-gnu, s390x)	16m 32s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	8m 38s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64)	8m 51s
linux-arm (arm-unknown-linux-musleabihf, arm)	8m 15s
musllinux (x86_64-unknown-linux-musl)	8m 32s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	9m 9s
musllinux (i686-unknown-linux-musl)	7m 42s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	8m 21s
musllinux-cross (powerpc64le-unknown-linux-musl, ppc64le, nightly)	7m 19s
	2h 55m 29s

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