package streamable

Release v0.17.0

• [ppx_streamable] now supports for variant type constructors with inline record payloads.
• [ppx_streamable] now builds on OCaml 5.1
• added [Expert] [Direct_stream_writer] functions to State and Plain RPCs.
• Removed redundang [bin_size_t] calls when streaming types with repetition (e.g. lists, maps)