Symfony bundle - Handle driver configuration with Reference class (#312)

As `Nextras\Dbal\Connection->createDriver()` does support driver as instance, I have added this into Symfony bundle config.

Author: MarosPixel

src/Bridges/SymfonyBundle/DependencyInjection/NextrasDbalExtension.php

@@ -59,6 +59,10 @@ private function loadConnection(
 			ContainerInterface::NULL_ON_INVALID_REFERENCE,
 		);
 
+        if (isset($config['driver']) && is_string($config['driver']) && str_starts_with($config['driver'], '@')) {
+            $config['driver'] = new Reference(ltrim($config['driver'], '@'));
+        }
+
 		$connectionDefinition = new Definition(Connection::class);
 		$connectionDefinition->setArgument('$config', $config);
 		$connectionDefinition->setPublic(true);