fix: never use a shell

README.md

@@ -10,23 +10,16 @@ use Nih\CommandBuilder\Stdio;
 
 require_once __DIR__ . '/vendor/autoload.php';
 
-$child = (new Command('/usr/bin/cat'))
+$child = (new Command('cat'))
     ->stdin(Stdio::piped())
-    ->spawn(shell: false);
+    ->stdout(Stdio::piped())
+    ->spawn();
 
 $child->stdin?->write('Hello, this is pretty cool.');
-$child->stdin?->close();
 
 $output = $child->output();
 
-var_dump($output)
+echo $output->stdout;
 
-// object(Nih\CommandBuilder\Output)#4 (3) {
-//   ["stdout"]=>
-//   string(27) "Hello, this is pretty cool."
-//   ["stderr"]=>
-//   string(0) ""
-//   ["code"]=>
-//   int(0)
-// }
+// Hello, this is pretty cool.
 ```