Update flask-sqlalchemy to 2.4.3

[pyup-bot]

This PR updates Flask-SQLAlchemy from 2.4.1 to 2.4.3.

Changelog

2.4.3

-------------

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`

2.4.2

-------------

Released 2020-05-25

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

Links

• PyPI: https://pypi.org/project/flask-sqlalchemy
• Changelog: https://pyup.io/changelogs/flask-sqlalchemy/
• Repo: https://github.com/pallets/flask-sqlalchemy
• Docs: https://pythonhosted.org/Flask-SQLAlchemy/

[coveralls]

Pull Request Test Coverage Report for Build 724

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 0.0%

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Totals
Change from base Build 715:	0.0%
Covered Lines:	0
Relevant Lines:	0

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💛 - Coveralls