- add: switch to `embed` once 1.16 is out
  https://tip.golang.org/pkg/embed/
- add: enclosures (podcasts etc)
  https://github.com/shagr4th/yarr/commits/master
- fix: broken base link in https://applieddivinitystudies.com/
- fix: migrate to cascade delete
  https://sqlite.org/foreignkeys.html#fk_actions
- fix: loading items (by scrolling down) is glitching while feeds are refreshing
- doc: self-hosting instructions (including certificates)
- etc: test gofeed against real-world feeds, compare results with https://pypi.org/project/feedparser/
