Bump flask-sqlalchemy from 2.4.4 to 2.5.1 (#214)

Bumps [flask-sqlalchemy](https://github.com/pallets/flask-sqlalchemy) from 2.4.4 to 2.5.1.
- [Release notes](https://github.com/pallets/flask-sqlalchemy/releases)
- [Changelog](https://github.com/pallets/flask-sqlalchemy/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/flask-sqlalchemy/compare/2.4.4...2.5.1)

---
updated-dependencies:
- dependency-name: flask-sqlalchemy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -36,7 +36,7 @@ setup(
     packages=find_packages(exclude=['tests', 'tests.*']),
     install_requires=[
         'Flask==2.0.1',
-        'Flask-SQLAlchemy==2.4.4',
+        'Flask-SQLAlchemy==2.5.1',
         'Flask-Migrate==3.0.1',
         'Flask-Bootstrap==3.3.7.1',
         'Flask-WTF==0.15.1',