Unpin prospector

[egpbos]

Version 1.8.4 should have fixed the issues previously mentioned in #423. See https://github.com/PyCQA/prospector/milestone/7?closed=1. Also relevant to the discussion in NLeSC/python-template#327

[egpbos]

The linter runs, so I think this should be considered an improvement over pinning the old version? The failures are due to actual linter suggestions, which I guess are a separate issue :)

[loostrum]

Nice, good that the linter is running again. I agree with unpinning prospector and creating a separate issue for the linting problems. The pylint version pin was unrelated, that was already there before the prospect pin. I don't know why and I'm tempted to just unpin pylint as well, because I don't see why it was pinned in the first place.

[egpbos]

Oh right, I didn't check if pylint was necessary to unpin. Is that then causing (some of) the linting failures now? Anyway, may indeed be good to unpin as well, especially if there's no reason to keep it pinned, but maybe someone else knows why it was pinned, @cwmeijer or @elboyran?

[cwmeijer]

I don't remember anything about pinning prospector. It doesn't seem sensible to me to pin the version of a well maintained linter package. Unpin it :-)