Update changelog

Author: Jean85

CHANGELOG.md

@@ -3,7 +3,11 @@ 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).
-## Unreleased
+
+## 1.1.0 [2021-03-12]
+* Allow PHP 8 (#9)
+
+## 1.0.0 [2020-11-16]
  * Bump requirement to PHP 7.2
 
 ## 0.1.4 [2020-06-12]