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- Added `GeometryIntersectionFilter`.
- Added general GeoJsonSerializer which allows you to specify the field names
you want to serialize and extract to geojson. The GeoJsonSerializer allows
you to specify nested fields.
- Added a set of standard export fields for each model.
- Automatically pick the correct serializer based on file extention
- .json/.geojson --> to_geojson
- .gpgk --> to_geopackage
- .shp --> to_shape