Add support for remaining send methods

[eioo]

Would it be possible to add remaining send methods to the tester? These consist of:

sendAudio
sendDocument
sendVideo
sendAnimation
sendVoice
sendVideoNote
sendMediaGroup
sendLocation
sendVenue
sendContact
sendChatAction

Personally I'm only interested in sendAudio and sendVoice methods. If you're busy @jehy I can try to make a PR for it.

[jehy]

Hi! Unfortunately, I am not developing any telegram bots right now and I suppose that without it I won't make those methods really good. But a PR would be great!

[eioo]

Wrote my own customized tester for my needs (sendAudio, sendVoice), found in my repo soundbot

Someone can pick up this issue, I tried and failed. :/