bump patch version #552

Job	Run time
test (1.6, ubuntu-latest, x64, ForwardDiff)	3m 31s
test (1.6, ubuntu-latest, x64, Tracker)	3m 20s
test (1.6, ubuntu-latest, x64, ReverseDiff)	3m 49s
test (1.6, ubuntu-latest, x64, Zygote)	4m 36s
test (1.6, macOS-latest, x64, ForwardDiff)	6m 21s
test (1.6, macOS-latest, x64, Tracker)	3m 45s
test (1.6, macOS-latest, x64, ReverseDiff)	5m 2s
test (1.6, macOS-latest, x64, Zygote)	8m 14s
test (1, ubuntu-latest, x64, ForwardDiff)	2m 22s
test (1, ubuntu-latest, x64, Tracker)	2m 8s
test (1, ubuntu-latest, x64, ReverseDiff)	2m 27s
test (1, ubuntu-latest, x64, Zygote)	2m 42s
test (1, macOS-latest, x64, ForwardDiff)	5m 8s
test (1, macOS-latest, x64, Tracker)	4m 16s
test (1, macOS-latest, x64, ReverseDiff)	5m 4s
test (1, macOS-latest, x64, Zygote)	3m 45s
	1h 6m 30s

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