• Support encoding and decoding attrs types (#323).
• Add repr_omit_defaults configuration option for omitting struct default values in the repr (#322).
• Expose a struct's configuration through a __struct_config__ attribute (#328).
• Add msgspec.structs.fields utility function for inspecting the fields configured on a Struct (#330).
• Add a dict configuration option for adding a __dict__ attribute to a Struct (#331).
• Allow non-struct mixins to be used with struct types (#332).
• Fix a bug when defining both lt and gt constraints on an integer type (#335).
• Fix a bug supporting fields defined with msgspec.field() with no arguments (#343).
• Allow arbitrary input types to msgspec.from_builtins (#346).
• Support decoding into subclasses of int & bytes in msgspec.from_builtins (#346).
• Add msgspec.UNSET and msgspec.UnsetType for tracking unset fields. See the docs for more information (#350).
• BREAKING: In the unlikely event you were using the previous msgspec.UNSET singleton to explicitly indicate no default value on struct types, you should now make use of msgspec.NODEFAULT instead (#350).
• Improve struct type annotations now that mypy supports typing.dataclass_transform (#352).
• Support typing.Final annotations for indicating that an object field should be treated as immutable (#354).
• Add a name keyword option to msgspec.field for renaming a single field (#356).
• BREAKING: The rules around class inheritance and a struct's rename option have changed. See #356 for more information.