v4.2.3

Hotfix for gradio pydantic issue with fastapi
Upgraded to Gradio 4.43 hoping it will fix remaining issues
Added new action when no face detected -> use last swapped
Specified image format for image controls - opening new tabs on preview images possible again!
Hardcoded image output format for livecam to jpeg - might be faster than previous webp
Chain events to be only executed if previous was a success