minor #3387 FixCommand - forbid passing 'config' and 'rules' options together (keradus)
minor #3387 FixCommand - forbid passing 'config' and 'rules' options together (keradus)

This PR was squashed before being merged into the 3.0 branch (closes #3387).

Discussion
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FixCommand - forbid passing 'config' and 'rules' options together

Commits
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39a89315 FixCommand - forbid passing 'config' and 'rules' options together

FriendsOfPHP/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,keradus/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,keradus/PHP-CS-Fixer