fix CI. add `setup-sbt` action (#134) #63

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Run time

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Job	Run time
build (17, 2.12.20)	53s
build (17, 2.13.14)	46s
build (17, 3.3.3)	48s
build (21, 2.12.20)	56s
build (21, 2.13.14)	45s
build (21, 3.3.3)	48s
	4m 56s