- version update to 3.5.1
- Includes bug fix from 2.21.0.
- Fix list of nullable nested fields ``List(Nested(Field, allow_none=True)``
(:issue:`1497`). Because this fix reverts an optimization introduced to
speed-up serialization and deserialization of lists of nested fields, a
negative impact on performance in this specific case is expected.
- Improve type coverage (:issue:`1479`). Thanks :user:`Reskov`.
- Fix typing for ``data`` param of ``Schema.load`` and ``ValidationError`` (:issue:`1492`).
Thanks :user:`mehdigmira` for reporting and thanks :user:`dfirst` for the PR.
- Remove unnecessary typecasts (:pr:`1500`). Thanks :user:`hukkinj1`.
- Remove useless ``_serialize`` override in ``UUID`` field (:pr:`1489`).
- ``fields.Nested`` may take a callable that returns a schema instance.
Use this to resolve order-of-declaration issues when schemas nest each other (:issue:`1146`).
- Passing the string ``"self"`` to ``fields.Nested`` is deprecated.
Use a callable instead.
- Fix typing for ``Number._format_num`` (:pr:`1466`). Thanks :user:`hukkinj1`.
- Make mypy stricter and remove dead code (:pr:`1467`). Thanks again, :user:`hukkinj1`.