replace kernel with get kernel in clone

Author: albertcht

src/Server/Application.php

@@ -451,7 +451,7 @@ public function __clone()
         $this->application = $application;
 
         if ($this->framework === 'laravel') {
-            $this->rebindKernelContainer($this->kernel);
+            $this->rebindKernelContainer($this->getKernel());
         }
     }
 }