feat: Don't transpile classes

[mister-ben]

Description

Ensure classes are not transpiled. The transpiled classes outputted in videojs-contrib-quality-levels.es.js are being included as-is in video.es.js

Also update dependencies and tooling generally.

Requirements Checklist

• [x] Feature implemented / Bug fixed
• [ ] If necessary, more likely in a feature request than a bug fix
  • [ ] Unit Tests updated or fixed
  • [ ] Docs/guides updated
• [ ] Reviewed by Two Core Contributors