Future:
  ☐ Migrate code to TypeScript

Maybe:
  ☐ Switch to https://github.com/MatAtBread/fast-async (it's supposed to be faster)
  ☐ Support nested suffixes: `*.suffix.suffix.js`
  ☐ Publish plugins
  ☐ Add patch files that patch single lines, like `foo.patch.js` (quite ugly and not future proof)
  ☐ Replace redundant names with index (tab/tab.scss => tab/index.scss)
    ☐ allow implicit befores/requires (@require tab/tab.scss => @require tab/index.scss => @require tab)
    ☐ should `variables.scss` be inferred too?