Ret

What's Changed
* Add codecoverage by ThatXliner in https://github.com/ThatXliner/ret/pull/13


**Full Changelog**: https://github.com/ThatXliner/ret/compare/v0.1.3...v0.1.4

We use subcommands now

🐛 Fixed a meta-bug

The executable `ret` now works!

Notable changes 😃
- Fixed bug 🐛! The `findall` option now supports capture groups! 1 (4 pull request)
- Better help messages https://github.com/ThatXliner/ret/commit/f9b4de7bd5b5839c1d0959f9dd99473221e00536

All changes
- Better test coverage https://github.com/ThatXliner/ret/commit/b346fde23c6836b1f2611a2a4fb24fbcc9c2d1c2
- Better interal code structure 31d468e4d47d90426a746463d49ecafea86c0012, 6c0c3a0fefefd1ec615a47463ef566b827b5b5c2

See README