Tansy

Fast, I know.

- If either `Param(type=)` or a parameter's annotation is marked as `Optional`, if no default is given, the default will automatically be set to `None`.
- If a parameter is a channel type, and if `X` in `Param(type=X)` is a `Union` of channel models or is a channel model, *and* `channel_types` hasn't been set, tansy will not smartly fill in `channel_types`. A mouthful, but it basically means `type=` has the same behavior as an annotation
- Fix checking for `MENTIONABLE`.
- `Param(type=)` now typehints as `typing.Any` instead of a narrow type.

**Full Changelog**: https://github.com/Astrea49/tansy/compare/v0.2.0...v0.3.0

That didn't take too long.

Updates
- `tansy` now parses a `Union` of channels correctly, even filling in `channel_types` for you.
- `tansy` now makes sure all options are valid.
- In general, `Union`s are now actually supported.
- Fixed a bug with certain types, even if they were valid, failing in weird ways.

**Full Changelog**: https://github.com/Astrea49/tansy/compare/v0.1.0...v0.2.0

The first release of tansy. There is no documentation as of right now, and likely a *lot* of bugs.