add more properties to Update Subscription request

* Send also device_os, sdk, app_version

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalUser/Source/OSUserRequests.swift

@@ -1266,6 +1266,9 @@ class OSRequestUpdateSubscription: OneSignalRequest, OSUserRequest {
         subscriptionParams.removeValue(forKey: "address")
         subscriptionParams.removeValue(forKey: "notificationTypes")
         subscriptionParams["token"] = subscriptionModel.address
+        subscriptionParams["device_os"] = subscriptionModel.deviceOs
+        subscriptionParams["sdk"] = subscriptionModel.sdk
+        subscriptionParams["app_version"] = subscriptionModel.appVersion
 
         // notificationTypes defaults to -1 instead of nil, don't send if it's -1
         if subscriptionModel.notificationTypes != -1 {