Spotdl

Added
- Add support for Vorbis & Opus output formats. ([Sigill](https://github.com/Sigill)) (#769)

Fixed
- "YouTube returned no videos for the search query" for most tracks. ([ritiek](https://github.com/ritiek)) (#775)

Added
- Add metadata to a track from a different track. ([ritiek](https://github.com/ritiek)) (#757)

Changed
- Exit with an appropriate code on bad arguments. ([ritiek](https://github.com/ritiek)) (#736)

Changed
- Specifically display what went wrong with FFmpeg when encoding fails.
([ritiek](https://github.com/ritiek)) (#748)

Fixed
- Fix complaining about missing `spotdl.patch`.
([ritiek](https://github.com/ritiek)) (120ae9e3629253bfabf8091e0762eeacc4e63b04)

Fixed
- Patch PyTube so it correctly parses YouTube videos.
([ritiek](https://github.com/ritiek)) (#742)

Fixed
- Fix crash if YouTube search results contains live streams
([ritiek](https://github.com/ritiek) (#735)
- Skip invalid tracks returned on playlist endpoint with Spotify Web-API
([ritiek](https://github.com/ritiek)) (#732)