测试：增加设备数限制功能

app/Http/Controllers/V1/Admin/PlanController.php

@@ -45,6 +45,7 @@ class PlanController extends Controller
                     User::where('plan_id', $plan->id)->update([
                         'group_id' => $params['group_id'],
                         'transfer_enable' => $params['transfer_enable'] * 1073741824,
+                        'device_limit' => $params['device_limit'],
                         'speed_limit' => $params['speed_limit']
                     ]);
                 }