prepare release

Author: dbu

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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 2.2.0 - 2020-14-12
+
+### Added
+
+- PHP 8.0 support
+
 ## 2.1.0 - 2019-12-27
 
 ### Added