Upgrade zig 0.15

[Gaiden-Spence]

Updated the katana library to from 0.13 to 0.15

[wallabra]

Is upstream unmaintained?

[Gaiden-Spence]

Is upstream unmaintained?

I'm not too sure I'm fairly new to this so if you have any suggestions let me know. Thanks

[wallabra]

Yeah, I think snowclipsed might be inactive so. I don't know what the usual procedure is in this kind of situation. I guess I'll just try your fork :)

If you do decide to keep maintaining it as a hard fork (and I'll try to help!), I suggest you edit the title a bit, call it, I dunno, heck, katana-resharpened if you want; and add in the README that it's a maintained fork and that it was updated for Zig 0.15.

@snowclipsed you still around? We love your library! We want to know if you're still available to work on it, or if you would endorse a community fork. Thanks! :)

[snowclipsed]

Hi, sorry it's been a very busy year, I have a personal migration to 0.15.0 but I don't know how much time I will be able to spend to maintain this. I just started a new job so I will get even less time. May archive it but I'll try my best to review it this weekend. No promises unfortunately :(

[snowclipsed]

I'm open to suggestions and forks!

[Gaiden-Spence]

Yeah if you need me to close this PR request I totally can and can work off of another fork. Just let me know. Thank you both @wallabra and @snowclipsed for coordinating I really appreciate it!