update spec and core pins #255

Job	Run time
initial-cleanup	29s
initial-cleanup	36s
build	9s
build	2m 5s
generate-initial-collection-json / run	40s
generate-initial-collection-json / run	35s
test-stage / run	46s
test-stage / run	59s
test-publish / run	43s
test-publish / run	54s
test-generate-collection-staged-json / run	37s
test-generate-collection-staged-json / run	34s
test-generate-collection-json / run	41s
test-generate-collection-json / run	37s
test-backup / run	1m 22s
test-backup / run	1m 7s
	12m 54s

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