base-orphans-0.6: Backwards-compatible orphan instances for base

base-orphans defines orphan instances that mimic instances available in later versions of base to a wider (older) range of compilers. base-orphans does not export anything except the orphan instances themselves and complements base-compat. See the README for what instances are covered: https://github.com/haskell-compat/base-orphans#readme. See also the what is not covered section.