_buildStyle(tok) {
    const el = this.doc.createElement(tok.tagName);

    el.setAttribute('type', tok.type);

    // Set attributes
    utils.eachKey(tok.attrs, (name, value) => {
      el.setAttribute(name, value);
    });

    return el;
  }
Build a style element from an atomic style token.

@param {Object} tok The token
@returns {Element}