bugfixes
- hls.js throws error 'Malformed WebVTT signature.' for WebVTT file which has UTF-8 BOM characters. #1286 #1307
- Change fragment retry / honor max fragment retry #1314
- Align on cc when CC changes during a quality switch and SN is unreliable #1309
- Live stream stalls with "playback stalling in low buffer" #1172
- tsdemuxer: fix undefined reference exception when NDR is received before IDR #1327
- Empty metadata textTrack added regardless of in-band data #1330
- Seeking to duration causes player stalling #1336
- Visual artifacts during the live stream #1335