Update youtube-dl to 2019.10.22
Changes:
- [utils] Improve subtitles_filename
- [facebook] Bypass download rate limits
- [contv] Add support for contv.com
- [viewster] Remove extractor
- [xfileshare] Improve extractor
- [mangomolo] Fix video format extraction and add support for player URLs
- [audioboom] Improve metadata extraction
- [twitch] Update VOD URL matching
- [mit] Remove support for video.mit.edu
- [servingsys] Remove extractor
- [dumpert] Fix extraction
- [atresplayer] Fix extraction