Add batch functionality?

[magnusottosson]

I'm thinking about creating a slack transport with batch functionality that sends a message every x minutes with a list of errors that has occured and the amount of errors instead of sending an alert for each log/error.

Would you be interested in a PR into this repo for that functionality or should it be a transport of its own?

This transport is very simple and clean and it might just make to to complex to add batch functionality?

[youngkiu]

Can you please suggest a PR?
It doesn't matter if it's an additional transport.