testing for 8.3

[John Clements]

After a panoply of minor fixes, particularly around fixes for Monterey, we have a set of release candidates that are looking solid.

Here’s the release checklist for version 8.3:

https://github.com/racket/racket/wiki/Release-Checklist-8.3

I would love to get this wrapped up in the next day or two. Let me know if there are things I should know about.

Many thanks,

John