* ✅🎨 follow Bats coding style for tests
- [x] renamed working directory variable to `HAS_TMPDIR`
- [x] explicitly calling has binary
- [x] Only using `[[ ]]` for regex matches
* ✨ add coreutils and archiving utilities to known commands
- [x] command mapping `*coreutils` to `gnu_coreutils`
- [x] ✅ add test for gnu_coreutils
- [x] 💚 add archiving packages to travis
- [x] ✅ add test for archiving commands
* ✨ add utilities `hub` and `zip`
- [x] add custom processing for `hub` and `zip`
- [x] ✅ add tests for `hub` and `zip`
* adding restyled.io 🔧 config
* ✨ add dynamic `-V` check
- [x] 👌 update 'ab' to use dynamic `-V`
- [x] 👌 update 'go' to use dynamic `arg version`
- [x] 🚨 general whitespace and whitespace in command subsitution
- [x] [SC2004] 🚨 `$`/`${}` is unnecessary on arithmetic variables.
- [x] ✅ make `hub` test conditional on command found
Virgil