Slack POST message to multiple channels at once

Feature Requests
1

Hello,

It would be nice if it would be possible to automatically send a message to multiple channels using the slack node.
I end up with several slack nodes with exactly the same configuration just to send the message on several channels at the same time :

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I know that the method chat.postMessage from the slack API doesn’t natively allow you to do that.
I think it would be very convenient to have a loop on sending the message if you pass a channel dictionary.

What do you think ?

Thanks for this great tool.

Jules