plugins.vaughnlive: Update for API change
plugins.vaughnlive: Update for API change

chhe/streamlink,bastimeyer/streamlink,streamlink/streamlink,javiercantero/streamlink,streamlink/streamlink,melmorabity/streamlink,fishscene/streamlink,sbstp/streamlink,gravyboat/streamlink,fishscene/streamlink,sbstp/streamlink,bastimeyer/streamlink,javiercantero/streamlink,back-to/streamlink,ethanhlc/streamlink,chhe/streamlink,ethanhlc/streamlink,melmorabity/streamlink,mmetak/streamlink,back-to/streamlink,wlerin/streamlink,mmetak/streamlink,beardypig/streamlink,gravyboat/streamlink,beardypig/streamlink,wlerin/streamlink