Changelog for barbies

0.1.3.0

• Use both Monoid and Semigroup as constraints for the Monoid instance, so that this works with ghc 8.0 to 8.4 (Fraser Murray)

0.1.2.0

• Use Monoid and not Semigroup as constraints for the Monoid instance

0.1.1.0

• Add instance Semigroup (Barbie b) to go along the Monoid instance

0.1.0.1

• Works under GHC 8.0.2, but notice one needs to use empty instance declarations, because ghc chokes on deriving clauses.

0.1.0.0 - Initial release