This allows configuration via PHP.
It also combines code sniffer and php cs fixer.
Used commands:
composer remove --dev squizlabs/php_codesniffer
composer req --dev symplify/easy-coding-standard
./vendor/bin/ecs --fix
* Adjust names of tasks.
* Add composer require checker.
* Install without plugins to not use custom installer and stay
compatible with require checker.
* Stay phpunit 10 compatible.