Google-generativeai

- Bugfix: Add missing enum names to `saftey_types.py`
- Update to `google.ai.generativelanguage` v0.3.3
- replace generativelanguage_v1beta3 with generativelanguage
since that's the default in `v0.3.3`.

* Add support for tuning:
* Add get_tuned_model.
* Add list_tuned_models.
* Add create_tuned_model.
* More flexible safety settings:
* Accept strings and ints for enums.
* Accept a {category:threshold} dict in addition to the list of dicts format (`[{"category": category, "threshold": threshold}, ...]`).
* Add support for batched embeddings.

* First real release.
* Support for text generation, chat and embeddings.