3.1.0

This is a feature release, which includes new features and removes previously deprecated code. The 3.1.x branch is now the supported bug fix branch. We encourage everyone to upgrade, and to use a tool such as pip-tools to pin all dependencies and control upgrades.

• Changes: https://flask-sqlalchemy.palletsprojects.com/en/3.1.x/changes/#version-3-1-0
• Milestone: https://github.com/pallets-eco/flask-sqlalchemy/milestone/15?closed=1