Rasa

- [11048](https://github.com/rasahq/rasa/issues/11048): Removed Python 3.6 support as [it reached its end of life in December 2021](https://www.python.org/dev/peps/pep-0494/#lifespan).

- [10675](https://github.com/rasahq/rasa/issues/10675): Fix broken conversion from Rasa JSON NLU data to Rasa YAML NLU data.

- [10808](https://github.com/rasahq/rasa/issues/10808): Fix the importing of retrieval intents when using a multidomain file with entity roles and groups.

- [10394](https://github.com/rasahq/rasa/issues/10394): Allow single tokens in rasa end-to-end test files to be annotated with multiple entities.

Some entity extractors (s.a. `RegexEntityExtractor`) can generate multiple entities from a single expression. Before this change, `rasa test` would fail in this case, because test stories could not be annotated correctly.
New annotation option is
YAML
stories:
- story: Some story
steps:
- user: |
cancel my [iphone][{"entity":"iphone", "value":"iphone"},{"entity":"smartphone", "value":"true"}{"entity":"mobile_service", "value":"true"}]
intent: cancel_contract

- [10728](https://github.com/rasahq/rasa/issues/10728): Use `tf.function` for model prediction to improve inference speed.
- [10743](https://github.com/rasahq/rasa/issues/10743): Fix `rasa test core` error from running test story that contains an entity but no user utterance text.
- [10768](https://github.com/rasahq/rasa/issues/10768): Merge domain entities as lists of dicts, not lists of lists to support entity roles and groups across multiple domains.

Miscellaneous internal changes
- [10740](https://github.com/rasahq/rasa/issues/10740)

- [10606](https://github.com/rasahq/rasa/issues/10606): Fix `max_history` truncation in `AugmentedMemoizationPolicy` to preserve the most recent `UserUttered` event.
Previously, `AugmentedMemoizationPolicy` failed to predict next action after long sequences of actions (longer than `max_history`) because the policy did not have access to the most recent user message.