1.2.0

• BREAKING CHANGE: Remove instances for ErrorT and ListT
  • These types are deprecated

1.1.5

• Fix build failures on GHC 8.4 and 8.6
• Add support for safe Haskell
  • Specifically, this marks the Control.Monad.Trans.Compose module as Trustworthy
  • The change in 1.1.4 to use GeneralizedNewtypeDeriving meant that the Control.Monad.Trans.Compose module was no longer inferred as safe
• Restore Traversable instance removed by mistake in 1.1.4

1.1.4 (Blacklisted)

• Unintentional removal of Traversable instance for ComposeT
  • This missing instance is restored in 1.1.5
  • This is the reason why the 1.1.4 release is blacklisted
• Fix MonadFail-related code to work for GHCJS
• The MonadRWS instance for ComposeT has a more flexible constraint
  • The constraint is now MonadReader r (f (g m)), MonadWriter w (f (g m)), MonadState s (f (g m)) instead of MonadRWS r w s (f g m)
  • This loosening of the constraint is backwards-compatible

1.1.3

• Add an MFunctor instance for ComposeT for GHC >= 8.6
• Add GHC 8.8 support

1.1.2

• Conditionally disable Polykinds to support older versions of GHC

1.1.1

• Increase upper bound on transformers-compat

1.1.0

• BREAKING CHANGE: Enable PolyKinds
  • This should in theory be a non-breaking change, but due to a bug in GHC 8.0.1 and kind inference ambiguities I'm marking this as a breaking change