Add persistent_tasks test #436

Job	Run time
Test Julia ~1.10.0-0 ubuntu-latest	2m 17s
Test Julia 1.9 ubuntu-latest	2m 31s
Test Julia 1.8 ubuntu-latest	1m 33s
Test Julia 1.7 ubuntu-latest	2m 31s
Test Julia 1.6 ubuntu-latest	1m 44s
Test Julia 1.5 ubuntu-latest	1m 36s
Test Julia 1.4 ubuntu-latest	2m 33s
Test Julia nightly ubuntu-latest	7m 3s
Test Julia 1 windows-latest	3m 21s
Test Julia 1.4 windows-latest	11m 47s
Test Julia nightly windows-latest	7m 52s
Test Julia 1 macOS-latest	2m 23s
Test Julia 1.4 macOS-latest	3m 23s
Test Julia nightly macOS-latest	8m 15s
	58m 49s

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