Automated native_function_invocation fixes

src/Spout/Autoloader/autoload.php

@@ -8,7 +8,7 @@ require_once 'Psr4Autoloader.php';
  * @var string
  * Full path to "src/Spout" which is what we want "Box\Spout" to map to.
  */
-$srcBaseDirectory = dirname(dirname(__FILE__));
+$srcBaseDirectory = \dirname(\dirname(__FILE__));
 
 $loader = new Psr4Autoloader();
 $loader->register();