Update changelog since v2.0.1 (#20)

Author: thomashoneyman

CHANGELOG.md

@@ -5,16 +5,20 @@ 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 (#18)
 
 New features:
 
 Bugfixes:
+- Don't early exit when window is undefined in `_unsafeReadProtoTagged` FFI implementation (#11)
 
 Other improvements:
+- Migrated CI to GitHub Actions and updated installation instructions to use Spago (#15)
+- Added a CHANGELOG.md file and pull request template (#19, #20)
 
 ## [v2.0.1](https://github.com/purescript-web/purescript-web-events/releases/tag/v2.0.1) - 2019-04-10
 
-Allow `unsafeReadProtoTagged` to work in node (@AndrewBrownK)
+- Allow `unsafeReadProtoTagged` to work in node (@AndrewBrownK)
 
 ## [v2.0.0](https://github.com/purescript-web/purescript-web-events/releases/tag/v2.0.0) - 2019-02-23
 
@@ -26,5 +30,4 @@ Allow `unsafeReadProtoTagged` to work in node (@AndrewBrownK)
 
 ## [v1.0.0](https://github.com/purescript-web/purescript-web-events/releases/tag/v1.0.0) - 2018-05-24
 
-Initial release
-
+- Initial release