Good to see lua still evolving!

Lua 5.4.0 first came out in June of 2020.

    Last-Modified: Thu, 18 Jun 2020 16:11:05 GMT

This seems too soon for 5.5? /s

Point releases in Lua are like major releases for other projects. You can get the source here https://www.lua.org/work/#5.5.0