* Handle multiple M2M id list fields * Expand serialization_specs recursively * Fix nullability and type issue with `MethodCall` plugin
Improvements:
* Use Django's Exists aggregation logic for Exists
0.5beta
Fix a bug where reverse many-to-many relations could not be traversed because of erroneously attempting to prefetch the reverse foreign key where there wasn't one.
0.4beta
* Add `SerializationSpecMixin.get_serializatoin_spec(self, request)` method * Add `Aliased()` and allow alias to be specified in `Filtered`
0.3
Make `self.request_user` also available in `SerializationSpecPlugin`s within `Filtered`s
0.2beta
Make `self.request_user` available in `SerializationSpecPlugin`s