2.2.0

This is a feature release, which includes new features and removes previously deprecated code. The 2.2.x branch is now the supported bug fix branch, the 2.1.x branch will become a tag marking the end of support for that 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.palletsprojects.com/en/2.2.x/changes/#version-2-2-0
• Milestone: https://github.com/pallets/flask/milestone/19?closed=1