monad-time-0.3.1.0: CHANGELOG.md

# monad-time-0.3.1.0 (2018-04-09)
* Restored compatibility with GHC versions < 7.10
  ([#4](https://github.com/scrive/monad-time/issues/4)).

# monad-time-0.3.0.0 (2018-04-03)
* Added a MonadTime instance for ReaderT UTCTime
  ([#2](https://github.com/scrive/monad-time/pull/2)).