Add reason to EventSub onRevoke event

[theca11]

Feature Request

EventSub revocation messages arrive with a status field that indicates the reason for revoking. This reason isn't currently provided in the onRevoke event, and it would be nice to have it (onRevoke((subscription, reason) => { /* ... */ }))

I think it's a nice addition for all cases, but especially for EventSubWs since onUserAuthorizationRevoke isn't available for the websockets transport and this way at least we have some feedback about the revocation.