Update CHANGELOG.md

Updated for new version released.

Author: lukecav

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).
 
+## [Version 1.1.6] - 2022-05-11
+
+* Bump required PHP version to 7.4.
+
 ## [Version 1.1.5] - 2022-05-06
 
 * Bump WooCommerce and WordPress tested versions.