Django-unicorn

- [Disable poll](https://www.django-unicorn.com/docs/polling/#disable-poll) with a component field
- Dynamically change polling options with [PollUpdate](https://www.django-unicorn.com/docs/polling/#pollupdate)
- Basic support for [`pydantic`](https://pydantic-docs.helpmanual.io) models

- Component key to allow disambiguation of components of the same name
- `$returnValue` special argument
- Get the last action method's return value

- Redirect from action method in component

- Fix encoding issue with default component template on Windows (https://github.com/adamghill/django-unicorn/issues/91)
- Fix circular import when creating the component (https://github.com/adamghill/django-unicorn/issues/92)

- $model special argument and decorator.
- $toggle special method.
- Support nested properties when using the set shortcut.
- Fix action string arguments that would get spaces removed inadvertently.

Breaking changes:
All existing special methods now start with a $ to signify they are magical. Therefore, refresh is now $refresh, reset is now $reset, and validate is now $validate.

- Use LRU cache for constructed components to prevent ever-expanding memory.
- Loosen `beautifulsoup4` version requirement.
- Fix bug to handle floats so that they don't lose precision when serialized to JSON.
- Fix bug to handle related models (ForeignKeys, OneToOne, etc) fields in Django models.