update changelog

Author: Babichev Maxim

changelog.md

@@ -5,6 +5,11 @@ 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).
 
 ## [Unreleased]
+### Added
+- Add support laravel 5.9
+- Add support mariadb: 5.5, 10.0+
+- Add support percona: 5.6
+- Add support mysql: 5.6
 
 ## [3.0.1] - 2019-06-17
 ### Fixed