remark-gfm 3.0.0

• 890005e Add support for GFM footnotes ✨ (if you were using remark-footnotes before, you should remove it!) (how footnotes are turned to HTML is done in remark-rehype, please update that too)

Full Changelog: https://github.com/remarkjs/remark-gfm/compare/2.0.0...3.0.0