Log Message:
py-flask-sqlalchemy: Update to 2.4.3.

Version 2.4.3
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Released 2020-05-26

-   Deprecate ``SQLALCHEMY_COMMIT_ON_TEARDOWN`` as it can cause various
    design issues that are difficult to debug. Call
    ``db.session.commit()`` directly instead. :issue:`216`

Version 2.4.2
-------------

Released 2020-05-25

-   Fix bad pagination when records are de-duped. :pr:`812`