code: async function tableOfContentsTransform(
    content: string,
    options: *,
    comment: string
  ): Promise<string> {
    return toc.insert(content.replace(comment, '<!-- toc -->'));
  }
docs: Generate a table of contents from markdown
  
  @example
  <!--emdaer-t
  - '@emdaer/transform-table-of-contents'
  -->
  @param   {string}          content The content
  @returns {Promise<string>}         The content with the table of contents inserted