Prepare for release 1.6.0 (#69)

CHANGELOG.md

@@ -3,8 +3,29 @@
 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]
 
+## [1.6.0]
+
+### Added
+
+- Added support for listing groups #29
+- Added PHP CS Fixer to CI
+- Added PHPStan to CI
+- Added Rector to CI
+- Lots of code refactoring and improvements
+
+### Fixed
+
+- Wrong comparison to 0 in response #42
+
+### Deprecated
+
+- Deprecated PHP 7.4 support
+- Deprecated PHP 8.0 support
+- Deprecated PHP 8.1 support
+
 ## [1.5.0]
 
 ### Fixed
@@ -51,7 +72,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 - Fix deprecation warning when running tests on PHP 8.1 and 8.2
 
-[Unreleased]: https://github.com/slunak/pushover-php/compare/v1.5.0...HEAD
+[Unreleased]: https://github.com/slunak/pushover-php/compare/v1.6.0...HEAD
+[1.6.0]: https://github.com/slunak/pushover-php/compare/v1.5.0...v1.6.0
 [1.5.0]: https://github.com/slunak/pushover-php/compare/v1.4.0...v1.5.0
 [1.4.0]: https://github.com/slunak/pushover-php/compare/v1.3.2...v1.4.0
 [1.3.2]: https://github.com/slunak/pushover-php/compare/v1.3.1...v1.3.2