Dupe of <a href="https://news.ycombinator.com/item?id=29097692" rel="nofollow">https://news.ycombinator.com/item?id=29097692</a>. Didn't see that one at the time I submitted this, unfortunately.
The submission link is to the announcement. The GitHub repo is <a href="https://github.com/Roblox/luau" rel="nofollow">https://github.com/Roblox/luau</a>.