*   Compared to `tf.lookup.experimental.DenseHashTable` this offers
            lower overall memory usage, and a cleaner API. It does not require
            specifying a `delete_key` and `empty_key` that cannot be inserted
            into the table.
    *   Added support for specifying number of subdivisions in all reduce host
        collective. This parallelizes work on CPU and speeds up the collective

* Add support for `response_model_exclude_defaults` and `response_model_exclude_none`:
    * Deprecate the parameter `include_none` in `jsonable_encoder` and add the inverted `exclude_none`, to keep in sync with Pydantic.
    * PR [#1166](https://github.com/tiangolo/fastapi/pull/1166) by [@voegtlel](https://github.com/voegtlel).