Bump version to 0.5.5 #69

Job	Run time
windows (x86_64-pc-windows-msvc, x64)	7m 27s
macos-x86_64	8m 28s
macos-aarch64	3m 21s
linux (x86_64-unknown-linux-gnu)	4m 42s
windows (i686-pc-windows-msvc, x86)	9m 3s
linux (i686-unknown-linux-gnu)	7m 2s
windows (aarch64-pc-windows-msvc, x64)	8m 39s
sdist	4m 8s
linux-cross (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	5m 18s
musllinux (x86_64-unknown-linux-musl)	4m 47s
linux-cross (armv7-unknown-linux-gnueabihf, armv7)	5m 2s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	5m 43s
musllinux (i686-unknown-linux-musl)	4m 1s
linux-cross (s390x-unknown-linux-gnu, s390x)	5m 24s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	4m 50s
linux-cross (powerpc64le-unknown-linux-gnu, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	5m 29s
linux-cross (powerpc64-unknown-linux-gnu, ppc64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	5m 2s
linux-cross (arm-unknown-linux-musleabihf, arm)	4m 38s
	1h 43m 4s

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