Update to latest Luaparse

[pablomayobre]

Luaparse has merged the changes needed to use Luaparse in Autocomplete-Lua, and has since made other commits, it would be great if Autocomplete-Lua was moved away from a fork of Luaparse into master again

EDIT: I see you made one more change, it would be better to push this to master too, it's a really simple one so there shouldn't be a problem

EDIT2: I have gone ahead and made a PR over at luaparse