Twitch-dl

* Add support for HD video qualities (163)

* Add `clips --target-dir` option. Use in conjunction with `--download` to
specify target directory.
* Fix a crash when downloading clips (160)
* Handle video URLs which contain the channel name (162)
* Don't stop downloading clips if one download fails

* Fix fetching access token (155, thanks KryptonicDragon)

* Show more playlist data when choosing quality
* Improve detection of 'source' quality for Twitch Enhanced Broadcast Streams
(154)

* Add m dot url support to video and clip regexes (thanks localnerve)

* Respect --dry-run option when downloading videos
* Add automated tests on github actions