build: update PHP-CS-Fixer config

.php-cs-fixer.dist.php

@@ -20,6 +20,7 @@
         'phpdoc_order' => true,
         'yoda_style' => false,
         'no_superfluous_phpdoc_tags' => false,
+        'fully_qualified_strict_types' => false,
         'declare_strict_types' => true,
     ])
 ;