Bundle stdlibs with runtimes #417

Job	Run time
check-deep-tests / check-deep-tests	8s
singletons	2m 26s
xunit-tests / osx	36m 41s
xunit-tests / win	30m 5s
xunit-tests / ubuntu-20.04	20m 26s
integration-tests / populate-matrix-dimensions	2s
integration-tests / test (ubuntu-20.04, 1)	16m 34s
integration-tests / test (ubuntu-20.04, 2)	17m 49s
integration-tests / test (ubuntu-20.04, 3)	23m 1s
integration-tests / test (ubuntu-20.04, 4)	25m 24s
integration-tests / test (ubuntu-20.04, 5)	16m 23s
test-coverage-analysis	0s
	3h 8m 59s

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