• Ensure None may be explicitly passed to defstruct for module/namespace/bases (#445).
• Support decoding datetime.datetime values from int/float values (interpreted as seconds since the Unix epoch) when strict=False (#452).
• Support subclasses of collection types (list, dict, ...) as inputs to convert (#453).
• Support str subclasses as keys in to_builtins and all protocol encode methods (#454).
• Improved performance when JSON encoding decimal.Decimal values (#455).
• Improved performance when JSON encoding int/float values (#458).
• Improved performance when JSON encoding str values (#459).
• Wrap errors in dec_hook with a ValidationError (#460).
• Support decoding decimal.Decimal values from numeric values (#463)
• Support encoding decimal.Decimal values as numeric values (#465).
• Support converting decimal.Decimal values to float in convert (#466).
• Preliminary support for CPython 3.12 beta releases (#467).
• Support decoding integers that don't fit into an int64/uint64 (#469).
• Add a new optional __post_init__ method for Struct types (#470).
• Support decoding 0/1 into bool types when strict=False (#471).
• Wrap errors raised in __post_init__/__attrs_post_init__ in a ValidationError when decoding (#472).
• Add native support for encoding/decoding datetime.timedelta types (#475).
• Add a new msgspec.json.Encoder.encode_lines method for encoding an iterable of values as newline-delimited JSON (#479).