Build matrix

Fix foreach parse errors so that they report locations #960

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Run time

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Job	Run time
build-docker	7m 27s
build (4.08.1, ubuntu-latest)	5m 42s
build (5.2.1, ubuntu-latest)	5m 57s
build (5.2.1, macos-latest)	7m 22s
	26m 28s