Note about upgrading: [Doctrine uses static and runtime mechanisms to raise
awareness about deprecated code][deprecation-policy].

[deprecation-policy]: https://www.doctrine-project.org/policies/deprecation.html

# Upgrade to 1.2

## Deprecated inheritance

Extending `Doctrine\Deprecations\Deprecation` or any of the methods defined in
`Doctrine\Deprecations\PHPunit\VerifyDeprecations` is deprecated and will be an
error in 2.0.