- Add ability to play/pause by using `converse-rich-text`
- Make `converse-rich-text` component configurable whether the media URLs for GIF/audio/video are shown
- Add fallback options for GIFs that have errors
Had to make various other changes due to incompatibilities.
- Use the new `lit` package instead of `lit-html` or `lit-element`
- Drop `haunted` since it breaks the rules by specifying `type: module`
but then doesn't import with file extensions
- Use Sass Dart instead of node-sass (fixes#2445)
- Upgrade Karma