Update to comply with owlready2>0.41 (#639) #1860

Job	Run time
EMMO documentation (test using ontodoc)	4m 36s
pytest (3.7)	4m 27s
pytest (3.8)	4m 31s
pytest (3.9)	5m 25s
pytest (3.10)	5m 27s
pytest (3.11)	4m 19s
External / Run `pylint` & `safety`	1m 36s
External / Build distribution package	34s
External / Build Documentation	1m 28s
External / Run `pre-commit`	1m 49s
	34m 12s

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