changelog v4.0.0

Author: rpearce

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [4.0.0] - 2019-09-12
+
+### Changed
+* now building commonjs & ESM build outputs in `dist/` folder
+* using rollup for building output
+* security fixes
+* removed peer dependency on `react-dom`
+
 ## [3.0.1] - 2019-02-13
 
 ### Added