Add Enzyme tests #169

Job	Run time
test (1.6, ubuntu-latest, x64, Others)	4m 31s
test (1.6, ubuntu-latest, x64, Enzyme)	4m 29s
test (1.6, ubuntu-latest, x64, ForwardDiff)	3m 52s
test (1.6, ubuntu-latest, x64, Tracker)	4m 57s
test (1.6, ubuntu-latest, x64, ReverseDiff)	5m 2s
test (1.6, ubuntu-latest, x64, Zygote)	4m 25s
test (1, ubuntu-latest, x64, Others)	6m 18s
test (1, ubuntu-latest, x64, Enzyme)	6m 10s
test (1, ubuntu-latest, x64, ForwardDiff)	7m 20s
test (1, ubuntu-latest, x64, Tracker)	7m 35s
test (1, ubuntu-latest, x64, ReverseDiff)	7m 20s
test (1, ubuntu-latest, x64, Zygote)	7m 26s
test (1, macOS-latest, x64, Others)	8m 5s
test (1, macOS-latest, x64, Enzyme)	8m 23s
test (1, macOS-latest, x64, ForwardDiff)	7m 55s
test (1, macOS-latest, x64, Tracker)	8m 23s
test (1, macOS-latest, x64, ReverseDiff)	8m 12s
test (1, macOS-latest, x64, Zygote)	1s
	1h 50m 24s

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