Add Telegram support

[suntong]

Hope sending to Telegram will be supported soon too.

Telegram API
https://core.telegram.org/api

Telegram Bot API
https://core.telegram.org/bots/api

Bot Code Examples
https://core.telegram.org/bots/samples

[suntong]

Telegram will keep a history of all channel messages, so anyone who is joining late into the game can still browse back and see what's been posted previously, which makes it a perfect place to gather image trials like this.

[ryuheechul]

Sure, it would be great to have more options about where to send the screenshots.
So, I will look into it and see what I can do about it. Thanks for the issue!

[suntong]

thanks,

Just in case you want to choose which nodejs library to use to talk to Telegram. take a look at this Telegram bot list,
I personally think the edisonchee/slimbot is best, but I don't know the nodejs ecosystem though.