Test 2.4 & 2.5 on macos-amd64 #178

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (2.4 / ubuntu-latest)	22s
build (2.5 / ubuntu-latest)	24s
build (2.6 / ubuntu-latest)	23s
build (2.6 / macos-latest)	30s
build (2.7 / ubuntu-latest)	25s
build (2.7 / macos-latest)	29s
build (3.0 / ubuntu-latest)	11s
build (3.0 / macos-latest)	16s
build (3.1 / ubuntu-latest)	12s
build (3.1 / macos-latest)	14s
build (3.2 / ubuntu-latest)	11s
build (3.2 / macos-latest)	15s
build (3.3 / ubuntu-latest)	11s
build (3.3 / macos-latest)	14s
build (head / ubuntu-latest)	12s
build (head / macos-latest)	21s
build (2.4 / macos-13)	1m 13s
build (2.5 / macos-13)	1m 5s
	7m 10s

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