Release v2.5.4 · livekit/client-sdk-flutter

What's Changed

Pre-connect audio buffer by @hiroshihorie in #830
Data channel reliability by @hiroshihorie in #871
fix the warnings and remove the ignorance from flutter analyze by @xianshijing-lk in #906
Token source by @hiroshihorie in #901
fix: CancelListenFunc should have a declared return type by @spydon in #908
Use generator for json serialization by @hiroshihorie in #911
fix: sif frame enqueing with e2ee by @td-famedly in #918
event logging by @hiroshihorie in #925
Refactor participant creation by @hiroshihorie in #927
fix: Enable SW AEC/NS/AGC for linux. by @cloudwebrtc in #926
Fix pending tracks race condition by @hiroshihorie in #928
add reusable completer utility by @hiroshihorie in #904

Full Changelog: v2.5.3...v2.5.4