Update version of SFZ3 Mix to 0.13

[jmmoore]

The maintainer of Street Fighter Zero 3 Mix has made significant updates to the romhack since it was added to this repo.

The newest versions require a modified driver for CPS2, so I have no expectations around that happening without meaningful mods to the CPS2 core, and that is out of scope for this project.

I would love, however, to see the most recent version before that modified driver was implemented, version 0.13.