sendPoll(chatId, question, pollOptions, form = {}) {
    form.chat_id = chatId;
    form.question = question;
    form.options = stringify(pollOptions);
    return this._request('sendPoll', { form });
  }
Send poll.
Use this method to send a native poll.

@param {Number|String} chatId  Unique identifier for the group/channel
@param {String} question Poll question, 1-300 characters
@param {Array} pollOptions Poll options, between 2-10 options (only 1-100 characters each)
@param {Object} [options] Additional Telegram query options
@return {Promise} On success, the sent [Message](https://core.telegram.org/bots/api#message) object is returned
@see https://core.telegram.org/bots/api#sendpoll