Dev/CI dependencies: add some QA tools

PHP Copy/Paste Detector (PHCPD) ---> not work with PHP 7.2 and symfony/console 5.0 (need PHP 7.3)
PhpMnd (detect magic numbers) ---> impossible to install at the moment because conflict between dependencies
PHP Mess Detector (PHPMD) ---> #24 (closed)
SensioLabs Security Checker ---> #25 (closed)
PHP Compatibility (adds rules to phpcs) ----> need #27 (closed) ---> #28 (closed)

see:

Edited Mar 02, 2020 by Fabrice Gangler