v2.2.0

Added

• (streaming) expose server-streaming RPCs as SSE

Fixed

• (streaming) make error frames terminal and rename SSE error event
• (config) reject zero SSE keep-alive interval
• (streaming) let hyper choose NDJSON body framing
• (streaming) parse all Accept headers and quality factors for SSE

Other

• (readme) trim streaming feature bullet to a headline
• (streaming) cover terminal error frames and SSE event name
• (streaming) add regression tests for Accept negotiation