build

Define most of Pathname in Ruby #158

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (3.3 / ubuntu-latest)	12s
build (3.3 / macos-latest)	11s
build (3.3 / windows-latest)	1m 40s
build (3.2 / windows-latest)	1m 49s
build (3.4 / windows-latest)	1m 45s
build (3.4 / macos-latest)	12s
build (3.2 / ubuntu-latest)	17s
build (3.2 / macos-latest)	10s
build (3.4 / ubuntu-latest)	6s
build (head / ubuntu-latest)	7s
build (mingw / windows-latest)	1m 45s
build (head / macos-latest)	12s
build (mswin / windows-latest)	1m 46s
	10m 16s

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