v6 roadmap

[ungoldman]

• replace (or just supplement) layout.html convention with transforms:
  • allow piping markdown to a function in a JS file (e.g. transform.js) to add whatever you want
  • potentially anything from custom layouts to additional preprocessing to React/MDX support
• remove highlightjs and github-headings options (super dated, not working great anymore)
• change default el selector (either just main or maybe .sitedown)
• convert to async/await (RIP callbacks)

[ungoldman]

support single files, globs, etc (https://github.com/ungoldman/sitedown/issues/37)

[ungoldman]

resolve index.md issue (https://github.com/ungoldman/sitedown/issues/18)