v1.13

Fix for custom Enum serializable classes

In the version 1.12 if you inherit both Enum and SerializableType classes you will get an exception TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases like in the following example:

class Example(IntEnum, SerializableType):
    A = 1
    B = 2

    def _serialize(self):
        return {"value": self.name}

    @classmethod
    def _deserialize(cls, value):
        return Example.__members__[value["value"]]