keep Github pulls subscription while unsubscribing from pull requests merge events

[LoganWlv]

Hi,

Thanks for the great work on integrating Github to slack, it works amazingly!

We use a slack channel that subscribes to:

/github subscribe name/repo pulls

This includes pull request merge events, I was wondering if it was possible to filter those merge events?

[naor-capitola]

+1 I'm looking for a way to subscribe only to new PR created event, and not to merge event.
Seems like there's an open issue for this since 2018.