Version 5 brings the status code HTTP_CREATED (201) to the response when the handler returns an entity inserted to the database. This change may break the attended response code status.
The ParamFetcherInterface is now accepted in replacement of the Request to limit the responsibility of the bundle.
Now, instanciated services can be put in argument of successHandler and failureHandler to avoid using the container to get them. Still, the previous notation using the service name is compatible.
Be aware that the Bundle no longer use the RegistryInterface to get the EntityManager but will use directly the EntityManagerInterface service.
Finally, all services available from the bundle are now available for autowiring. The old notation is still supported.