Support audio and document as Album

[Provissy]

Description

According to https://core.telegram.org/bots/api#sendmediagroup , telegram accepts four types of InputMedia, however, current bot.SendAlbum only parses Photo and Video.

When sending audios as album you get telebot: album entry #0 is not valid

[Provissy]

What is the reason commit 206507e being reverted?

Thank you!

[demget]

I will return it back soon and retest the behavior again.

[demget]

v2.4