Add NFData instances for URIRef

[TOTBWF]

No description provided.

[TOTBWF]

Actually, I see that dddf7b0 removed deepseq as a dependency. This makes it a bit tricky to write NFData instances, so would it be acceptable to bring deepseq back in?

[MichaelXavier]

I wish I would have written a reason for dropping that dependency. Are you sure you need a lower bound that high in deepseq? It seems to be failing one of the LTSes in the build matrix because of it. If so,I don't mind dropping that old of an LTS out of the matrix, but I wouldn't want to do it for no reason. While you're at it, you can go ahead and drop the upper bound too. Over time I've found pessimistic upper bounds to cause more problems than they solve, so I'll probably drop most or all of the upper bounds in the next release of the package.

[TOTBWF]

I was using deepseq 1.4 for the generics deriving stuff, but I can just use deepseq-generics to handle that, so there isn't any need to drop support.