[Haskell-cafe] RFC: functor-classes-compat

Hi, continuing pushing the adoption Data.Functor.Classes, I wrote a small package `functor-classes-compat` [1]. It provides lifted (Eq1, Ord1, etc.) classes for types in `containers`, `vector` and `unordered-containers`(not for Sequence or Tree yet though). I guess there is no way they could depend on `transformers` to provide instances in build plans with `base < 4.9`, I'm not sure when I'll have time to write patches for the actual packages myself. Current implementations are naive, but more obviously correct. The package is not yet released on Hackage, I'll do that after the comments, which are warmly welcome! Best regards, Oleg Grenrus [1]: https://github.com/phadej/functor-classes-compat