add appcast stanza for 77 Casks

Again focused on Casks which have version numbers.

This completes the first round of adding Sparkle-standard `appcast` stanzas for `link`-based Casks.

There are still more to be appcasts to be found:
- Casks that were added since I started this process
- Casks that use Sparkle with small modifications
- Casks that use non-Sparkle appcasts
- Casks that don't use `link` the link stanza