Continue to the next file when an ignored file is found when running checks in parallel.

This fixes #3317.

Author: Emil Andersson

src/Runner.php

@@ -483,6 +483,7 @@ private function run()
                         $file = $todo->current();
 
                         if ($file->ignored === true) {
+                            $todo->next();
                             continue;
                         }