[PNG] Cancelling next 2 meetings

Hello everyone,

I should have preemptively cancelled the coming meeting when I learned
Chris Lilley likely would not be joining. So I was about to do that. I
checked when the next meeting would be. It lands on a US holiday, Memorial
Day. So we should cancel that meeting, too.

That means our next meeting will be June 8th.

If anyone would prefer these meetings not be cancelled (kept or perhaps
rescheduled) feel free to say so. Otherwise, I'll see you in June :)