Registering SonataEasyExtendsBundle bundle is deprecated, it SHOULD NOT be registered.
Register SonataDoctrineBundle bundle instead.
In CategoryAdmin and CollectionAdmin,
disabling deep validation by unsetting the cascade_validation option is now deprecated,
and should be done by overriding getFormBuilder instead.
All files under the Tests directory are now correctly handled as internal test classes.
You can't extend them anymore, because they are only loaded when running internal tests.
More information can be found in the composer docs.