chore: prepare release 0.4.0

Author: ramsey

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
-## 0.4.0 - TBD
+## 0.4.0 - 2022-01-21
 
 ### Added