GHA: modernize #156

Job	Run time
windows-latest (devel)	3m 50s
windows-latest (release)	3m 43s
windows-latest (oldrel)	7m 43s
macOS-latest (devel)	2m 57s
macOS-latest (release)	2m 58s
macOS-latest (oldrel)	2m 51s
ubuntu-latest (devel)	5m 9s
ubuntu-latest (release)	3m 34s
ubuntu-latest (oldrel)	3m 43s
ubuntu-latest (oldrel-1)	3m 57s
ubuntu-latest (oldrel-2)	3m 52s
ubuntu-latest (3.6)	3m 41s
ubuntu-latest (release) ko	4m 24s
ubuntu-latest (release) keepWhere	3m 28s
ubuntu-latest (release) !keepWhere	3m 56s
ubuntu-latest (release) w/ future-develop	7m 3s
ubuntu-latest (release) w/ future-feature/evalFuture-3	4m 40s
	1h 11m 29s

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