docs: update CHANGELOG

CHANGELOG.md

@@ -6,7 +6,25 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
-## 1.0
+## 1.2.0
+
+### Added
+
+-   Support [the Joomla HTTP Package](https://github.com/joomla-framework/http) by [\@kernusr](https://github.com/kernusr) in [\#5](https://github.com/psr-discovery/http-client-implementations/pull/5)
+
+## 1.1.1
+
+### Changed
+
+-   Bump minimum supported PHP version to 8.1
+
+## 1.1.0
+
+### Added
+
+-   Support [Symfony 7](https://symfony.com/7) components by [\@JanMikes](https://github.com/JanMikes) in [\#4](https://github.com/psr-discovery/http-client-implementations/pull/4)
+
+## 1.0.0
 
 ### Added