fix: add return type declaration to execute method (#4136)

* fix: add return type declaration to execute method

* fix: replace die with return statement in execute method

Author: mrhackcz

src/Component/PharUpdate/Console/Command.php

@@ -102,7 +102,7 @@ protected function configure()
     /**
      * {@inheritdoc}
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         if (null === $this->manifestUri) {
             throw new LogicException(
@@ -128,7 +128,6 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $output->writeln('<comment>Already up-to-date.</comment>');
         }
 
-        // Force exit to prevent warnings
-        die(0);
+        return self::SUCCESS;
     }
 }