Changelog - update the unit tests setup

Author: grogy

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Updated PHP Parallel Lint dependency version restraint [#8](https://github.com/php-parallel-lint/PHP-Console-Color/pull/8) from [@jrfnl](https://github.com/jrfnl).
 - Travis: changed from "trusty" to "xenial" [#7](https://github.com/php-parallel-lint/PHP-Console-Color/pull/7) from [@jrfnl](https://github.com/jrfnl).
+- Update the unit tests setup [#9](https://github.com/php-parallel-lint/PHP-Console-Color/pull/9) from [@jrfnl](https://github.com/jrfnl).
 
 ## [0.3] - 2020-05-14