Big 'ol set of patches and dep maintenance (#212)

Co-authored-by: FloatingGhost <hannah@coffee-and-dreams.uk>
Reviewed-on: https://akkoma.dev/AkkomaGang/pleroma-fe/pulls/212

src/components/rich_content/rich_content.jsx

@@ -138,12 +138,6 @@ export default {
           )
         })
       }
-
-      marked.use(markedMfm, {
-        mangle: false,
-        gfm: false,
-        breaks: true
-      })
       const mfmHtml = document.createElement('template')
       mfmHtml.innerHTML = marked.parse(content)