clear_ref_userdata is variadic

[Y0SH1M4S73R]

Updates meowtonin to 0.3.1, allowing byond_fn functions to be variadic.
Updates mlua because the version currently being used had a feature that would be rejected in future rust versions.
Makes clear_ref_userdata varidic to reduce FFI overhead when clearing userdata for multiple objects.

[Y0SH1M4S73R]

I was thinking of testing this locally before merging due to CI not being able to pull up a runner, but I'm afraid this PR's gonna be blocked until there is a BYOND version post-1674 that isn't subtly borked in a way that causes client crashes that can cause restart-necessitating OS-level issues.

[SyncIt21]

CC @Y0SH1M4S73R

Latest version is 516.1681

[Y0SH1M4S73R]

You know what I'm not gonna wait for this to build I tested it and all the tests passed.

[SyncIt21]

Thanks for updating the repo. Can you make a pull updating dreamlua in the main repo? The debugger doesn't work on the latest byond version

[Y0SH1M4S73R]

Thanks for updating the repo. Can you make a pull updating dreamlua in the main repo? The debugger doesn't work on later versions

Only if the live servers are running on 1674 or later. The updated meowtonin dependency depends on breaking changes to byondapi made in 1674.

[SyncIt21]

Got it. You should probably ping oranges on discord to update the servers. I'll try to get in touch with him as well