add hlint rule for NonEmpty.unzip

[mixphix]

For CLC ticket #86.

[mixphix]

I wasn't sure if this was the best category to put it in. Let me know!

[ndmitchell]

Thanks for the hint - this should go in the base group, as we want it on by default.

[ndmitchell]

I'll move it

[ndmitchell]

You are of course right this is a generalisation hint, and if we weren't deprecating NonEmpty.unzip it would be exactly the right place for it to go. But given it is, we want it on by default. Moved in 6f84e5c

[snowleopard]

I just had to silence this warning because it was firing here. I'm not sure why it fires there: as far as I can tell, this unzip refers to the monomorphic one for lists, not to Data.List.NonEmpty.unzip as the HLint rule says. Maybe HLint can't really tell where that unzip is coming from? But then maybe the suggestion should be worded differently.

Note that I have import Data.List.NonEmpty (NonEmpty (..), nonEmpty, toList, reverse) at the top of the module, so I shouldn't have Data.List.NonEmpty.unzip in scope.

Not a big deal (I just disabled the warning) but something felt fishy, hence my report.