Bump flask-security-too from 3.3.0 to 5.3.3

Bumps [flask-security-too](https://github.com/Flask-Middleware/flask-security) from 3.3.0 to 5.3.3.
- [Release notes](https://github.com/Flask-Middleware/flask-security/releases)
- [Changelog](https://github.com/Flask-Middleware/flask-security/blob/master/CHANGES.rst)
- [Commits](Flask-Middleware/flask-security@3.3.0...5.3.3)

---
updated-dependencies:
- dependency-name: flask-security-too
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -31,7 +31,7 @@ flask-marshmallow==0.7.0
 Flask-Migrate==2.7.0
 Flask-Principal==0.4.0
 Flask-Script==2.0.5
-Flask-Security-Too==3.3.0
+Flask-Security-Too==5.3.3
 Flask-SQLAlchemy==2.1
 Flask-Testing==0.8.1
 Flask-WTF==1.0.0