code: function inliner(css) {
    var css = fs.readFileSync(css).toString();
    var mqCss = siphon(css);
  
    var pipe = lazypipe()
      .pipe($.inlineCss, {
        applyStyleTags: false,
        removeStyleTags: true,
        preserveMediaQueries: true,
        removeLinkTags: false
      })
      .pipe($.replace, '<!-- <style> -->', `<style>${mqCss}</style>`)
      .pipe($.replace, '<link rel="stylesheet" type="text/css" href="css/app.css">', '')
      .pipe($.htmlmin, {
        collapseWhitespace: true,
        minifyCSS: true
      });
  
    return pipe();
  }
docs: Inlines CSS into HTML, adds media query CSS into the <style> tag of the email, and compresses the HTML