v51

5af4278 update to Zig master `0.9.0-dev.443` (Meghan Denny)

7e0f55d update dependencies (Meghan Denny)

ef20897 add `version` command, closes #18 (Meghan Denny)

ac7be5d update root deps.zig (Meghan Denny)

faf6190 deps.zig- `.dirs` no longer needs to pub (Meghan Denny)

5a5394b deps.zig- expose `Package.directory`, closes #9 (Meghan Denny)

7fd89da main- print available commands when no arguments are passed (Meghan Denny)

4c50d70 util- `git_rev_HEAD` now accepts a `std.fs.Dir` (Meghan Denny)

b4add62 main- move command list const up (Meghan Denny)

a2d75dc main- expose `build_options` to other parts of code (Meghan Denny)

9690ee6 dry up commands struct (Meghan Denny)

4369779 cmd/fetch- attempt using `detct_mainfile` when dep has no zig.mod (Meghan Denny)

4b04e9f move `detect_pkgname` and `detct_mainfile` from cmd/init to util (Meghan Denny)

18fe4b2 util/yaml- fix formatting for events (Meghan Denny)