fix:low version

@@ -2,8 +2,9 @@
 
 namespace Lackoxygen\TiktokShop\Command;
 
-use Illuminate\Console\Command;
 use Lackoxygen\TiktokShop\Supervisor\Session\SessionHeart;
+use Illuminate\Console\Command;
+
 
 class RefreshToken extends Command
 {
@@ -12,14 +13,14 @@ class RefreshToken extends Command
      *
      * @var string
      */
-    protected string $signature = 'tiktok-shop:refresh.token';
+    protected $signature = 'tiktok-shop:refresh.token';
 
     /**
      * The console command description.
      *
      * @var string
      */
-    protected string $description = 'The refresh tiktok shop token';
+    protected $description = 'The refresh tiktok shop token';
 
     /**
      * Create a new command instance.
@@ -36,7 +37,7 @@ class RefreshToken extends Command
      *
      * @return int
      */
-    public function handle(): int
+    public function handle()
     {
         SessionHeart::new()->keepalive();