setChatTitle(chatId, title, form = {}) {
    form.chat_id = chatId;
    form.title = title;
    return this._request('setChatTitle', { form });
  }
Use this method to change the title of a chat. **Titles can't be changed for private chats**.

The bot **must be an administrator in the chat** for this to work and must have the appropriate admin rights.

@param {Number|String} chatId  Unique identifier for the target chat or username of the target channel (in the format `@channelusername`)
@param {String} title New chat title, 1-255 characters
@param {Object} [options] Additional Telegram query options
@return {Promise} True on success
@see https://core.telegram.org/bots/api#setchattitle