Upgrading from v2.0.1 to v2.1.0

Upgrading from v1 to v2.0.0

every class marked as @final is now final
all properties are now fully type-hinted
all methods arguments are now fully type-hinted
all methods have now return types
all constructors now use property promotion
all deprecated features were removed
the new default type for mapping is "attribute". You can still use annotations, but you need an explicit definition (set "annotation" as value for "vich_uploader.metadata.type" config key)
the service "vich_uploader.current_date_time_helper" has been removed. The DateTimeHelper interface has been removed as well.
if your project use doctrine-bundle >= 2.8 version, you must require doctrine/annotations in order to use annotations or attributes for mapping