models.DecimalField no longer supported?

[giilby]

Maybe this is actually an issue with a newer version of https://github.com/algolia/algoliasearch-client-python, but in any case, after upgrading to v4.0.0 of this package + v4.13.0 of the python client, indexing models with models.DecimalField fields fails with this error:

AttributeError: 'decimal.Decimal' object has no attribute 'to_dict'

[Enase]

same here, would be great to add:

    elif isinstance(obj, Decimal):
        return float(obj)

here https://github.com/algolia/algoliasearch-client-python/blob/main/algoliasearch/http/serializer.py#L64

[shortcuts]

Thanks! I'll release asap :)