Add quantified superclasses to NFData(1,2) #88
Description
In line with base: Relax instances for Functor combinators; put superclass on Class1 to make non-breaking we should add superclasses to NFData(1,2)
class (forall a. NFData (f a)) => NFData1 f
class (forall a. NFData a => NFData1 (bi a)) => NFData2 bi