Changelog updates since v2.0.1 (#26)

Author: milesfrain

CHANGELOG.md

@@ -5,12 +5,18 @@ Notable changes to this project are documented in this file. The format is based
 ## [Unreleased]
 
 Breaking changes:
+  - Added support for PureScript 0.14 and dropped support for all previous versions (#21)
 
 New features:
+- Added roles declarations to allow safe coercions (#20) 
+- Added monoid instances for uncurried `EffectFn`s (#13)
 
 Bugfixes:
 
 Other improvements:
+  - Migrated CI to GitHub Actions and updated installation instructions to use Spago (#22)
+  - Added a CHANGELOG.md file and pull request template (#25, #26)
+  - Removed `return {}` from FFI functions for a small performance boost (#18)
 
 ## [v2.0.1](https://github.com/purescript/purescript-effect/releases/tag/v2.0.1) - 2019-01-26