Handle non-array parameters for "queue" setting in supervisor config (#…

…1299)

* Handle non-array parameters for "queue" setting in supervisor config

* Update MasterSupervisorController.php

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Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Http/Controllers/MasterSupervisorController.php

@@ -33,7 +33,7 @@ public function index(MasterSupervisorRepository $masters,
                                 'status' => 'inactive',
                                 'processes' => [],
                                 'options' => [
-                                    'queue' => implode(',', $value['queue'] ?? []),
+                                    'queue' => (array_key_exists('queue', $value) && is_array($value['queue']) ? implode(',', $value['queue']) : $value['queue']) ?? '',
                                     'balance' => $value['balance'] ?? null,
                                 ],
                             ];