Test all JDKs on all OSes

Bump version to 3.1.9-SNAPSHOT for further development #1029

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Run time

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Job	Run time
build (17, windows-2022)	10m 13s
coverage	3m 12s
build (17, macOS-latest)	9m 21s
build (17, ubuntu-latest)	8m 7s
	30m 53s