Marshmallow-sqlalchemy

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Features:

* Distribute type information per `PEP 561 <https://www.python.org/dev/peps/pep-0561/>`_ (:pr:`420`).
Thanks :user:`bruceadams` for the PR.

Other changes:

* Test against Python 3.10 (:pr:`421`).

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Bug fixes:

* Fix generating fields for ``postgreql.ARRAY`` columns (:issue:`392`).
Thanks :user:`mjpieters` for the catch and patch.

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Bug fixes:

* Unwrap proxied columns to handle models for subqueries (:issue:`383`).
Thanks :user:`mjpieters` for the catch and patch
* Fix setting ``transient`` on a per-instance basis when the
``transient`` Meta option is set (:issue:`388`).
Thanks again :user:`mjpieters`.

Other changes:

* *Backwards-incompatible*: Remove deprecated ``ModelSchema`` and ``TableSchema`` classes.

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* Add ``load_instance`` as a parameter to `SQLAlchemySchema` and `SQLAlchemyAutoSchema` (:pr:`380`).
Thanks :user:`mjpieters` for the PR.

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* Fix deprecation warnings from marshmallow 3.10 and SQLAlchemy 1.4 (:pr:`369`).
Thanks :user:`peterschutt` for the PR.

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* ``auto_field`` supports ``association_proxy`` fields with local multiplicity
(``uselist=True``) (:issue:`364`). Thanks :user:`Unix-Code`
for the catch and patch.