*   `IntegerLookup` added `output_mode`, `sparse`, and
            `pad_to_max_tokens` arguments with same semantics as
            `TextVectorization`. Renamed `max_values`, `oov_value` and
            `mask_value` to `max_tokens`, `oov_token` and `mask_token` to align
            with `StringLookup` and `TextVectorization`.
        *   `TextVectorization` default for `pad_to_max_tokens` switched to
            False.