Add --version

[jayvdb]

Most commands provide a --version.
Any chance cargo-zigbuild would be interested in doing that?

[messense]

Already supported.

$ cargo-zigbuild --version
cargo-zigbuild 0.19.1

[jayvdb]

Ah, it is cargo zigbuild --version which doesnt work, but cargo-zigbuild --version is good enough for me.

[messense]

It's just how cargo external subcommand works, cargo zigbuild is actually calling cargo-zigbuild zigbuild, adding a --version to that command doesn't feel right, like you won't expect a --version option in cargo build command.