Bump version to v0.4.7 #483

Job	Run time
macos-aarch64	7m 35s
linux (x86_64-unknown-linux-gnu)	8m 22s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	9m 16s
linux-s390x (s390x-unknown-linux-gnu, s390x)	12m 11s
linux (i686-unknown-linux-gnu)	12m 19s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	8m 40s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le)	8m 52s
linux-arm (arm-unknown-linux-musleabihf, arm)	8m 9s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64)	8m 33s
macos-x86_64	9m 28s
sdist	7m 41s
windows (x86_64-pc-windows-msvc, x64)	14m 38s
windows (i686-pc-windows-msvc, x86)	15m 10s
musllinux (x86_64-unknown-linux-musl)	8m 51s
musllinux (i686-unknown-linux-musl)	7m 52s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	9m 21s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	8m 41s
musllinux-cross (powerpc64le-unknown-linux-musl, ppc64le, nightly)	7m 17s
	2h 52m 56s

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