add lupa stubs

[RedContritio]

• add stubs for lupa

[srittau]

Thanks! A few remarks below. Also, whenever using Any, it should be documented why Any is necessary and what the possible types are.

[RedContritio]

Thanks! A few remarks below. Also, whenever using Any, it should be documented why Any is necessary and what the possible types are.

I have removed almost all Anys, except for Callable[..., Any] used in decorators to represent arbitrary functions and *args: Any, **kwargs: Any used in variable arguments.

ps: The contents of luaXX.pyi and luajitXX.pyi are completely identical, so only one of them needs to be reviewed.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉