ghc-bifunctors-5.2-2.5

- Update to version 5.2 revision 0 with cabal2obs.

- update to 5.2
  * dded several Arrow-like instances for Tannen so we can use it as the Cayley
    construction if needed.
  * Added Data.Bifunctor.Sum
  * Added BifunctorFunctor, BifunctorMonad and BifunctorComonad.

- update to 5.1
  * Added Data.Bifunctor.Fix
  * Added Data.Bifunctor.TH, which permits TemplateHaskell-based deriving
    of Bifunctor, Bifoldable and Bitraversable instances.
  * Simplified Bitraversable.

- update to version 5
  * Inverted the dependency on semigroupoids. We can support a much wider array of base
  versions than it can.
  * Added flags

- correct licence to BSD-2-Clause

- initial commit