code: function processIconTemplate(srcFile, destFile, data, cb) {
    fs.readFile(srcFile, 'utf8', (err, srcFileContents) => {
      if (err) throw err;
      const result = template(srcFileContents, {
        // Use custom template delimiters of `{{` and `}}`.
        interpolate: /{{([\s\S]+?)}}/g,
        // Use custom evaluate delimiters of `{%` and `%}`.
        evaluate: /{%([\s\S]+?)%}/g,
      })(data);
      fs.writeFile(destFile, result, cb);
    });
  }
docs: Process Icon Templates
  @param {string} srcFile - Path to lodash template file.
  @param {string} destFile - Path to write processed file to.
  @param {object} data - Data to pass to template.
  @param {function} cb - Callback for when done.