v1.24

Changes

• Added support for Union types. It's recommended to place more complex variant types at first place like Union[Dict[int, int], List[int]] not Union[List[int], Dict[int, int]]. When optional type validation is implemented it will be possible not to follow this rule.
• It is now possible to use serialize and deserialize options for any third-party types and SerializableType classes if you need it for some reason.