[Rector] Applied all Symfony 5.x rectors to the production codebase (#18

)

Applied rules:
 * CommandConstantReturnCodeRector

src/bundle/Command/CronRunCommand.php

@@ -75,7 +75,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $this->logReportsOutput($reports);
         }
 
-        return 0;
+        return Command::SUCCESS;
     }
 
     private function logReportsOutput(CronReport $reports): void