fix: load extension bindings

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

src/Kernel.php

@@ -109,9 +109,7 @@ final class Kernel {
 	private function prepare_driver( ContainerInterface $container ): HookDriver {
 		$loader = new CompositeBindingLoader();
 		foreach ( $this->extensions as $extension ) {
-            foreach ($extension->bindings($container) as $bindings) {
-                $loader->add($bindings);
-            }
+			$loader->add( $extension->bindings( $container ) );
 		}
 
 		$driver = new GenericDriver(