Update CHANGELOG.md

Author: Chris Wiechmann

CHANGELOG.md

@@ -4,13 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased]
+## [1.9.0] 2022-02-09
 
 ### Added
 - Support to filter API-Specifications Models/Schemas
 
 ### Changed
-- Include/Exclude filter structure changed from object to an array.
+- Include/Exclude filter structure changed from single object to an array of filters
 
 ## [1.8.0] 2022-02-01