update changelog for 0.4.0 release

Phil Varner · Phil Varner · commit 946838ee52d6 · 2024-12-11T13:27:37.000-05:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,7 +6,7 @@ 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).
 
 
-## [unreleased]
+## [0.4.0] - 2024-12-11
 
 ### Added
 
