Fixed foreach that uses the wrong variable

Author: sebprt

src/Factory/Lookup.php

@@ -125,7 +125,7 @@ public function compile(array $config): SQL\Factory\Repository\Lookup
                 );
 
                 if (\array_key_exists('parameters', $alternative)) {
-                    foreach ($config['parameters'] as $key => $parameter) {
+                    foreach ($alternative['parameters'] as $key => $parameter) {
                         match (\array_key_exists('type', $parameter) ? $parameter['type'] : null) {
                             'integer' => $alternativeBuilder->addIntegerParam(
                                 $key,