Fixing RedisCluster deprecation of phpredis 6. (#1208)

Author: lucasromanojf

src/Bootstrappers/RedisTenancyBootstrapper.php

@@ -28,8 +28,8 @@ public function bootstrap(Tenant $tenant)
             $prefix = $this->config['tenancy.redis.prefix_base'] . $tenant->getTenantKey();
             $client = Redis::connection($connection)->client();
 
-            $this->originalPrefixes[$connection] = $client->getOption($client::OPT_PREFIX);
-            $client->setOption($client::OPT_PREFIX, $prefix);
+            $this->originalPrefixes[$connection] = $client->getOption(\Redis::OPT_PREFIX);
+            $client->setOption(\Redis::OPT_PREFIX, $prefix);
         }
     }
 
@@ -38,7 +38,7 @@ public function revert()
         foreach ($this->prefixedConnections() as $connection) {
             $client = Redis::connection($connection)->client();
 
-            $client->setOption($client::OPT_PREFIX, $this->originalPrefixes[$connection]);
+            $client->setOption(\Redis::OPT_PREFIX, $this->originalPrefixes[$connection]);
         }
 
         $this->originalPrefixes = [];