Extension v1.21.0 released

Extension v1.21.0 has been released.

Lots of enhancements and bug fixes were included in this release.

• As usual @ShanaryS made very large contributions to this release. Notably, asbplayer now supports generic subtitle detection for websites it doesn't explicitly support, with around 85% efficacy from his own testing.
• MvJ Primed Listening is now supported thanks to play mode enhancements by @JayXT
• @xwxb continues to own the Jimaku integration and implemented episode number auto-detection.
• A long-time bug where the Anki card browser doesn't refresh was fixed by @mvanhorn
• Crunchyroll subtitle detection was added by @cbgmvinicius and subtitle visibility in fullscreen was fixed by @rajpiskala.
• Stremio subtitle detection was fixed by @eXaminator

Thanks to all the contributors both old and new for making this release possible. Full release notes can be read here: v1.21.0