v3.0.0b8 — Generation optimization

• New providers for working with time: datetime_by_timestamp, date_by_timestamp and datetime_by_format.
• Add exec_type_checking function to deal with cyclic references by executing if TYPE_CHECKING: constructs.
• Add support for bytes inside literal, for example Literal[b"abc"].
• The library shows a hint if one class is a model and the other is not.
• Traceback of CannotProvide is hidden (it is raised when loader, dumper, or converter can not be created). It simplifies error messages to users. You can show traceback by disabling hide_traceback parameter of Retort.
• Drop support of Python 3.8.
• Refactor internal provider routing system. It becomes more simple and readable. Also, internal caching is added. This led to a 40% speedup in loader generation for medium models and up to 4x speedup for large models with many recursive types.

See the full list of changes at changelog.