[luatex] Where is re.lua of lpeg module?

[吕荐瑞]

By searching re.lua I found an old post:

https://dev-luatex.ntg.narkive.com/Yw0ZbpGm/texmf-luatex-is-coming

But I could not find re.lua of lpeq module in my TeXLive folder.
How can I use it? Should I submit it to CTAN first?

Thanks.