release 2.0.0

library upgraded to pydantic version 2. See https://docs.pydantic.dev/2.0/migration/

Breaking changes:

• generic models are no longer inherited from BaseGenericXmlModel but from BaseXmlModel.
• custom root type declaration has been changed. It must inherit RootXmlModel from now on.
• encoding customization api has been changed. See for more information.

New features:

• element attributes can be bound to TypedDict. See for more information.
• tagged unions support added. See for more information.
• computed entities support added. See for more information.