fix: call fixtures method

Author: SamMousa

src/Codeception/Module/Yii2.php

@@ -421,7 +421,7 @@ private function loadFixtures(object $test): void
         ) {
             $connectionWatcher = new ConnectionWatcher();
             $connectionWatcher->start();
-            $this->haveFixtures($test->{$this->config['fixturesMethod']});
+            $this->haveFixtures($test->{$this->config['fixturesMethod']}());
             $connectionWatcher->stop();
             $connectionWatcher->closeAll();
         }