fix: load mailmethod config

Author: SamMousa

src/Codeception/Module/Yii2.php

@@ -368,6 +368,7 @@ private function configureClient(array $settings): void
         $client->recreateApplication = $settings['recreateApplication'];
         $client->closeSessionOnRecreateApplication = $settings['closeSessionOnRecreateApplication'];
         $client->applicationClass = $settings['applicationClass'];
+        $client->mailMethod = $settings['mailMethod'];
         $client->resetApplication();
     }