Update coursier to 2.1.7 (#1574) #1873

Job	Run time
conformance	1m 56s
build (2_12, mima)	1m 29s
build (2_12, e2e)	4m 56s
build (2_12, proptest)	21m 47s
build (2_13, mima)	1m 30s
build (2_13, e2e)	6m 44s
build (2_13, proptest)	17m 40s
build (3, mima)	10s
build (3, e2e)	5m 12s
build (3, proptest)	9m 55s
build (2_12, examples_and_formatting)	3m 14s
ci-passed	1s
	1h 14m 34s

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