Added options for redis config (#6194)

Author: huangdijia

publish/redis.php

@@ -42,5 +42,8 @@
             'heartbeat' => -1,
             'max_idle_time' => (float) env('REDIS_MAX_IDLE_TIME', 60),
         ],
+        'options' => [
+            'prefix' => env('REDIS_PREFIX', ''),
+        ],
     ],
 ];