Send Telegram messages with markdown / HTML

Hi there. Thanks so much for developing this module.

For Telegram messages, is there any way to send messages with rich formatting in them, i.e. I can **bold**, _italicize_, etc?

Per here, the TG API supports this. https://stackoverflow.com/questions/38119481/send-bold-italic-text-on-telegram-bot-with-html.

Thanks!