- Mark $convert and $toLong operators as not implemented yet
- Handle negative limit values for cursor
- Add filter kwarg to list_collection_names (#681)
- Align equality and hashable capacity on Pymongo's object
- Really run tests for Python 3.9
- Add typing stubs
- Add the collation property to Cursor
- Add Python 3.9 to the test matrix
- Accept collation kwarg in update_one and update_many
- Performance improvement: create only one instance of _Filterer (#674)
- Implement '$concatArrays' aggregation pipeline operator (#672)