This is a feature release, which includes new features, removes previously deprecated code, and adds new deprecations. The 2.3.x branch is now the supported fix branch, the 2.2.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. Test with warnings treated as errors to be able to adapt to deprecation warnings early.

• Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-0
• Milestone: https://github.com/pallets/flask/milestone/24?closed=1