Support for Zig version 0.13+

[adworacz]

Considering that Zig has its own package management tooling now (managed by build.zig.zon files), and there's been some changes to the APIs used by build.zig, this package is now outdated and doesn't support the latest versions of Zig.

[SasLuca]

Thanks for pointing this out. I haven't kept up well with zig updates, but I will try to do so in a weekend and update the package.