Phalcon framework implementation update.

Author: mucan54

src/yoyo/YoyoPhalconServiceProvider.php

@@ -38,7 +38,7 @@ public function register(DiInterface $di): void
             ];
 
             $yoyo->configure($yoyoConfig);
-            $viewExtention = $this->viewExtention;
+            $viewExtention = $this->viewExtention ?? null;
 
             $yoyo->container()->singleton('yoyo.view.default', function () use ($di, $viewExtention) {
                 $view = $di->get('view');