Prepping for Koa.3 and Lilac.master

@nedbat and I are having a call, today, to figure out how to do both Koa.3 and Lilac.master later on during the week. It’ll be at 18:00 UTC - if any of you are interested, you can join using the following link:

The group’s calendar has an event, too, if you want to copy it over.