update changelog

Author: mikeebowen

CHANGELOG.md

@@ -5,6 +5,12 @@ 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).
 
+## [1.4.3] - 2022-01-24
+
+## Added
+- Updated mocha to fix security vulnerability
+- Moved classes and interfaces into separate files
+
 ## [1.4.2] - 2022-01-20
 
 ### Fixed