[feature request] implement getContacts api

[gengjiawen]

Feature Request

I have:

• searched for such a feature request (https://github.com/yagop/node-telegram-bot-api/labels/enhancement) and found none

Introduction

provide get contacts api https://core.telegram.org/method/contacts.getContacts

Example

Question

[gengjiawen]

Looks won't possible, this api not available to bot.