Remove Stringable from the signature, it's actually not supported

Author: fluffycondor

extension.neon

@@ -15,7 +15,6 @@ parameters:
 		skipCheckGenericClasses:
 			- Symfony\Component\OptionsResolver\Options
 	stubFiles:
-		- stubs/Php/Stringable.stub
 		- stubs/Psr/Cache/CacheItemInterface.stub
 		- stubs/Symfony/Bundle/FrameworkBundle/KernelBrowser.stub
 		- stubs/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.stub

stubs/Php/Stringable.stub

@@ -17,13 +17,13 @@ interface OutputInterface
     public const OUTPUT_PLAIN = 4;
 
     /**
-     * @param string|Stringable|iterable<string|Stringable> $messages
+     * @param string|iterable<string> $messages
      * @param int-mask-of<self::VERBOSITY_*|self::OUTPUT_*> $options
      */
     public function write($messages, bool $newline = false, int $options = 0): void;
 
     /**
-     * @param string|Stringable|iterable<string|Stringable> $messages
+     * @param string|iterable<string> $messages
      * @param int-mask-of<self::VERBOSITY_*|self::OUTPUT_*> $options
      */
     public function writeln($messages, int $options = 0): void;