Bump marshmallow from 3.20.1 to 3.22.0 #800

Job	Run time
lint	35s
unit (utests)	1m 12s
integration (tests-noqueue, QuickTest)	1m 43s
unit (tests-api-mock)	1m 4s
integration (tests-noqueue, BuildFailedTest)	32s
unit (tests-server)	1m 7s
integration (tests-noqueue, RepositoryTests)	37s
integration (tests-noqueue, TestBertE)	5m 51s
integration (tests-noqueue, TestQueueing)	31s
integration (tests-noqueue, TaskQueueTests)	3m 27s
integration (tests, QuickTest)	1m 39s
integration (tests, BuildFailedTest)	35s
integration (tests, RepositoryTests)	30s
integration (tests, TestBertE)	7m 17s
integration (tests, TestQueueing)	5m 24s
integration (tests, TaskQueueTests)	3m 29s
	35m 33s

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