Broken dependency constraints for pandoc-types 1.20

[gallais]

While working on msp-strath/Mary#46, I have noticed that pandoc-types-1.20
has the constraint QuickCheck (>=2.4 && <2.14) but it uses liftShrink in
Text.Pandoc.Arbitrary and that was only introduced in QuickCheck-2.10.

Is it possible to update the dependencies on hackage? Cheers!

[jgm]

I've just done it.

[gallais]

Thanks! <3