Sync AppendList

[sunjay]

I saw that you had done some work back in September to prepare this crate for a Sync version of AppendList. Is that still in the works? I have been looking for an append-only list that I can use in a multi-threaded context.

No worries if that won't be happening anytime soon. I've already implemented a workaround for what I'm working on using a different crate. Just curious about your plans for appendlist. :)

[danieldulaney]

It's more or less stalled. The project I was building it for ended up not happening for non-technical reasons. If you'd like to work on it, I'd be more than happy to pull any PRs you can put together!

[bplevin36]

I have a use case for this and will make a PR once I get a chance to work on it