Update flask_sqlalchemy to 2.5.1

[pyup-bot]

This PR updates flask_sqlalchemy from 2.2 to 2.5.1.

Changelog

2.5.1

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

Released 2021-03-18

-   Fix compatibility with Python 2.7.

2.5.0

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

Released 2021-03-18

-   Update to support SQLAlchemy 1.4.
-   SQLAlchemy ``URL`` objects are immutable. Some internal methods have
 changed to return a new URL instead of ``None``. :issue:`885`

2.4.4

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

Released 2020-07-14

-   Change base class of meta mixins to ``type``. This fixes an issue
 caused by a regression in CPython 3.8.4. :issue:`852`

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`

2.4.1

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

Released 2019-09-24

-   Fix ``AttributeError`` when using multiple binds with polymorphic
 models. :pr:`651`

2.4.0

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

Released 2019-04-24

-   Make engine configuration more flexible. (:pr:`684`)
-   Address SQLAlchemy 1.3 deprecations. (:pr:`684`)
-   ``get_or_404()`` and ``first_or_404()`` now accept a ``description``
 parameter to control the 404 message. (:issue:`636`)
-   Use ``time.perf_counter`` for Python 3 on Windows. (:issue:`638`)
-   Drop support for Python 2.6 and 3.3. (:pr:`687`)
-   Add an example of Flask's tutorial project, Flaskr, adapted for
 Flask-SQLAlchemy. (:pr:`720`)

2.3.2

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

Released 2017-10-11

-   Don't mask the parent table for single-table inheritance models.
 (:pr:`561`)

2.3.1

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

Released 2017-10-05

-   If a model has a table name that matches an existing table in the
 metadata, use that table. Fixes a regression where reflected tables
 were not picked up by models. (:issue:`551`)
-   Raise the correct error when a model has a table name but no primary
 key. (:pr:`556`)
-   Fix ``repr`` on models that don't have an identity because they have
 not been flushed yet. (:issue:`555`)
-   Allow specifying a ``max_per_page`` limit for pagination, to avoid
 users specifying high values in the request args. (:pr:`542`)
-   For ``paginate`` with ``error_out=False``, the minimum value for
 ``page`` is 1 and ``per_page`` is 0. (:issue:`558`)

2.3.0

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

Released 2017-09-28

-   Multiple bugs with ``__tablename__`` generation are fixed. Names
 will be generated for models that define a primary key, but not for
 single-table inheritance subclasses. Names will not override a
 ``declared_attr``. ``PrimaryKeyConstraint`` is detected.
 (:pr:`541`)
-   Passing an existing ``declarative_base()`` as ``model_class`` to
 ``SQLAlchemy.__init__`` will use this as the base class instead of
 creating one. This allows customizing the metaclass used to
 construct the base. (:issue:`546`)
-   The undocumented ``DeclarativeMeta`` internals that the extension
 uses for binds and table name generation have been refactored to
 work as mixins. Documentation is added about how to create a custom
 metaclass that does not do table name generation. (:issue:`546`)
-   Model and metaclass code has been moved to a new ``models`` module.
 ``_BoundDeclarativeMeta`` is renamed to ``DefaultMeta``; the old
 name will be removed in 3.0. (:issue:`546`)
-   Models have a default ``repr`` that shows the model name and primary
 key. (:pr:`530`)
-   Fixed a bug where using ``init_app`` would cause connectors to
 always use the ``current_app`` rather than the app they were created
 for. This caused issues when multiple apps were registered with the
 extension. (:pr:`547`)

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/