explicit list of supported versions #492

Job	Run time
test (test-conformance-cljs)	2m 45s
test (test-conformance-clj-sync)	1m 59s
test (test-lib-cljs)	1m 28s
test (test-lib-clj)	52s
test (npm-audit)	27s
test (test-conformance-clj-async)	2m 8s
	9m 39s

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