Update changelog (#22)

Author: mikeebowen

CHANGELOG.md

@@ -5,6 +5,10 @@ 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).
 
+## [1.5.2] - 2022-12-2
+- Fixed validation in Office 2007 (#20)
+- Updated vulnerable dependencies
+
 ## [1.5.1] - 2022-10-24
 - Updated OOXML Validator to version 2.1.1