===================
Bug fixes:
* Fix serialization of ``id`` for ``Relationship`` fields when
``attribute`` is set (:issue:`69`). Thanks :user:`jordal` for
reporting and thanks :user:`scottwernervt` for the fix.
Note: The above fix could break some code that set
``Relationship.id_field`` before instantiating it.
Set ``Relationship.default_id_field`` instead.
.. code-block:: python
before
fields.Relationship.id_field = "item_id"
after
fields.Relationship.default_id_field = "item_id"
Support:
* Test refactoring and various doc improvements (:issue:`63`, :issue:`86`,
:issue:`121,` and :issue:`122`). Thanks :user:`scottwernervt`.