SubqueryAggregate does not expose parameters other than distinct

[airstrike]

See https://github.com/martsberger/django-sql-utils/blob/88cf3a6ea513aacebd5bec616599938e77fd8e0a/sql_util/aggregates.py#L161-L168

This makes the ordering argument in ArrayAgg impossible to use. Ditto for any custom Aggregation a user may want to write

[airstrike]

Somewhat related to django/django#28296

[martsberger]

Ordering was added, but it is true that if there are other parameters to the aggregation, there is no mechanism to pass them. I will look into making this more general.

[jsayles]

The new default attribute on Sum would be lovely.