binarize 1.2.0 changelog

1.2.0 #

feat: added nullable payload type for storing nullable values of any other payload type.
docs: added a small section to the README about a use case.

feat: added Bytes payload type for reading and writing list of bytes.
feat: added support for reading and writing strings with lower and higher length storage.
- Deprecated: The string payload type is now deprecated in favor of the string32 payload type.
docs: improved documentation for most types.
feat: PayloadReader now has a offset property that indicates how far it has read.