Rasa

Compatibility release for Rasa Core 0.14.0. There have not been any
additional changes when compared to `0.13.1`.

Added
=====

- add formatter \'black\'
- Slots filled before the start of a form are now validated upon form start
- In debug mode, the values of required slots for a form are now printed
before submitting

Changed
=======

- [validate](){} functions for slots now return dictionaries of form {slot: value}
instead of value

Fixed
=====

- Slots extracted from entities in user input upon calling form activation are
now correctly validated

Added
=====

- Abstract Actions can now be subclassed
- add warning in case of mismatched version of rasa\_core and rasa\_core\_sdk
- `FormAction.from_trigger_intent` allows slot extraction from message
triggering the FormAction
- `Tracker.active_form` now includes `trigger_message` attribute to allow
access to message triggering the form

Added
=====

- add optional [validate\_{slot}]{.title-ref} methods to [FormAction]{.title-ref}
- forms can now be deactivated during the validation function by returning
[self.deactivate()]{.title-ref}
- Function to get latest input channel from the tracker with
`tracker.get_latest_input_channel()`

Changed
=======

- `self._deactivate()` method from the `FormAction` class has been
renamed to `self.deactivate()`