needed mdast-util-gfm-table to properly render tables

[iloveitaly]

The following pipeline would fail without explicitly setting toMarkdownExtensions:

  const markdownString = await unified()
    // NOTE
    .use(rehypeParse)
    .use(rehypeRemark)
    // NOTE without this, it would fail to render tables
    .data("toMarkdownExtensions", [gfmTableToMarkdown()])
    .use(remarkStringify)
    .process(transformedHtmlString)

In the docs, it seems to indicate that tables will be rendered just fine—what am I missing?