twitch-dl 2.7.0

 * Add new options when prompting if a file should be overwritten:
   overwrite, overwrite all, skip, skip all, abort (thanks @NuVanDibe)
 * Embed chapter metadata in video, allows skipping to chapter if video
   player supports it
 * Increase default worker count to 10, seems to improve speeds
 * Fix a bug where some clip slugs would not be recognized
 * Add `--skip-existing` option to `download` command
 * Add `--json` option to `chat` command
 * Improvements to chat renderer