Clipstick

Added

- Collection fields. [docs](https://sander76.github.io/clipstick/usage.html#collections)

Fixed

- Token refactoring
- Re-arranged documentation
- Simplified code

Fixed

- Proper parsing of optional type with `None` as a default.
- Improved help output.
- Replaced dataclasses with normal classes.
- Refactored parsing code [wip].
- Update readme.

Fixed

- Allow for providing optional arguments in an unordered way.

Previously, the parser assumed all optional arguments to follow after
the positional arguments. This version allows these to be whereever.

Fixed

- remove unused dependency
- fix multiline help output (remove the indent)

- update pypi metadata

- move to sphinx for documentation