Upgrade to zig 0.14.0

[krichprollsch]

Anyway, I am now setting a hard deadline of February 17th for the 0.14.0 tag.
[...]
If you have a Zig project that is pinned on Zig 0.13.0, now is a great time to upgrade to the latest master branch release. Our goal during Release Month is to ensure everyone gets a smooth upgrade, so if that is not the case for you, please speak up!
https://ziglang.org/news/what-to-expect-from-release-month/

[krichprollsch]

closed in favor of #423