By: Greg Pfeil <greg@technomadic.org>
Add `CommutativeT` and other transformer instances This is a breaking change. - add `CommutativeT` - add duoidal transformer instances for `IdentityT`, `MaybeT` and `ReaderT`. - add `filterM` / `filterM'` operations to `Control.Duoidal` - add (`p`|`s`)`fold`(`Map`) to `Data.Duoid` - add dependency on barbies for duoidal-transformers - add dependency on newtype package (and add `Newtype` instances) - extract commutative monoid / monad to their own modules - a lot of refactoring to use newtype ops & deriving strategies - get rid of `Control.Duoidal.Trans.Orphans` (the instances are now in `Control.Duoidal.Trans.Class`)