Added

• [#1560] Add support for sonata-project/doctrine-extensions ^2.0. (@jordisala1991)
• [#1560] Add support for sonata-project/twig-extensions ^2.0. (@jordisala1991)

Fixed

• [#1562] Add UniqueEntity constraint to email field in order to prevent UniqueConstraintViolationException exception. (@m-ar-c)