Update changelog

Author: realFlowControl

CHANGELOG.md

@@ -5,8 +5,14 @@ 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
+- PHP 7.4 to ci pipeline
+
 ### Changed
 - Updated all dev dependencies to latests versions
+- Fixed Travis build badge
+- PHPCS instead of PHPCSFixer
+- PSR2 -> PSR12
 
 ## [1.0.1] - 2019-08-25
 ### Added