Downgrade one version at a time

Author: Bellangelo

rector-downgrade.php

@@ -12,6 +12,9 @@
     ]);
 
     $rectorConfig->sets([
+        DowngradeLevelSetList::DOWN_TO_PHP_82,
+        DowngradeLevelSetList::DOWN_TO_PHP_81,
+        DowngradeLevelSetList::DOWN_TO_PHP_80,
         DowngradeLevelSetList::DOWN_TO_PHP_74,
     ]);
 };