`--version` doesn't print version info

On a fresh download of `crabz@0.8.1` on Linux: ```sh crabz -V ``` ```text crabz git:22d81b5 ``` FYI, the standard git commit reference is just a `g` prefix and then 7 characters: `g22d81b5`. Often like this: ```text crabz v0.8.1 (g22d81b5) ``` The reason it's formatted that way comes from `git-describe`, which is typically used by tools that mix git commit info with other baked-in build / release info.