[ANN] Agrest 5.0.M7

[Andrus Adamchik]

Another 5.0 milestone release is out. This one features some limited support for AgEntity inheritance. It works for GET requests, and with Cayenne backend only. So you can now fetch a mix of subclasses when requesting a superclass (either directly or via a nested include), you can apply property and object filters that are inherited in the same way variables in methods are inherited. 

Also the underlying model is now inheritance-aware, so adding support for inheritance in updates should not be much of a lift.

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Release notes:

* #583 Upgrade jackson-databind to 2.13.4.2
* #584 GET - Inheritance support - Cayenne backend
* #587 Inheritance-aware AgEntityOverlay

Andrus