Add app_payload and vkpay_transaction events

[SevereCloud]

https://vk.com/dev/groups.getLongPollSettings https://vk.com/dev/groups.getCallbackSettings

---

Требуется добавить события:

• app_payload
• vkpay_transaction

"app_payload": {
    "$ref": "#/definitions/base_bool_int"
},

"vkpay_transaction": {
    "$ref": "#/definitions/base_bool_int"
}