Update changelog

Author: sebastiaanluca

CHANGELOG.md

@@ -4,6 +4,12 @@ All Notable changes to `sebastiaanluca/laravel-boolean-dates` will be documented
 
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## 6.0.1 (2022-03-17)
+
+### Fixed
+
+- Fixed attribute getter value type hint
+
 ## 6.0.0 (2022-03-13)
 
 ⚠️ This release is a complete rewrite and changes the way it has to be used. Please consult the [README](README.md) for instructions.