constraints-extras-0.2.3.4: ChangeLog.md

# Revision history for constraints-extras

## 0.2.3.4 - 2019-03-22

* Added ChangeLog.md
* Replaced some occurrences of <> in Data.Constraint.Extras.TH with ++ so that the module will hopefully build with GHC 8.0.2 and 8.2.2 without needing to import Data.Semigroup.