[bugfix][NumPyVector] capture raw pointer to avoid performance penalty.

I also added a test for this class.

added 1 commit

• fccf232b - extended the test a bit

Compare with previous version

@robert.kloefkorn looks good. I extended the test a bit (making sure that changes to an array on the Python side is correctly picked up on the C++ side. If your happy with that change I'm happy for this to me merged.

enabled an automatic merge when the pipeline for fccf232b succeeds

@andreas.dedner: Ok, great. Lets merge it when the pipelines finish.

mentioned in commit fca24bcb

merged