v0.5.0

Added

• h2_settings: WebTransport over HTTP/2 settings (draft-ietf-webtrans-http2-14 §11.2). IDs 0x2b61-0x2b66 encode/decode as wt_initial_max_data, wt_initial_max_stream_data_uni, wt_initial_max_stream_data_bidi_local, wt_initial_max_stream_data_bidi_remote, wt_initial_max_streams_uni, wt_initial_max_streams_bidi. No defaults: absence means "not advertised".

Changed

• h2_settings:decode/1: unknown setting IDs are preserved under their raw 16-bit integer key in the returned map instead of being dropped. RFC 7540 §6.5.2 "MUST ignore" means "do not act on", not "discard"; keeping them lets higher layers (e.g. WebTransport) inspect extension settings without a patch here. h2_settings:encode/1 also accepts integer keys for symmetric round-trip.