Include version option in CLI

**Is your feature request related to a problem? Please describe.**
It would be nice to have a `-v` option in `woffu-cli` that returns the current version of the Python package.

**Describe the solution you'd like**
New `-v` option to return application version:

```bash
$ woffu-cli -v
version X.Y.Z
```

**Describe alternatives you've considered**
None

**Additional context**
None