[WIP] Matrix abstraction #245

Job	Run time
build (ubuntu-latest, Debug)	19s
build (windows-latest, Release)	9m 23s
build (ubuntu-latest, Release)	31s
build (macos-latest, Release)	27s
build (macos-latest, Debug)	13s
build (windows-latest, Debug)	9m 19s
	20m 12s

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