sendSettings method
Initiate the HTTP/3 connection by sending a SETTINGS frame on the control stream.
Stores the default local SETTINGS in _pendingSettings.
Implementation
Http3SettingsFrame sendSettings() {
_pendingSettings = Http3SettingsFrame.from(
maxFieldSectionSize: 65536,
maxTableCapacity: 0,
blockedStreams: 0,
);
return _pendingSettings!;
}