Added

• Translatable: Add defaultTranslationValue option to allow null or string value (#2167). TranslatableListener can hydrate object properties with null value, but it may cause a Type error for non-nullable getter upon a missing translation.

Fixed

• Uploadable: FileInfoInterface::getSize() return type declaration (#2413).
• Tree: Setting a new Tree Root when Tree Parent is null.
• Tree: update cache key used by Closure to match Doctrine's one (#2416).
• Tree: persist order does not affect entities on Closure (#2432)