stylelint-bundle-worker.js
function isBuffer(val) {
  return val.constructor
    && typeof val.constructor.isBuffer === 'function'
    && val.constructor.isBuffer(val);
}
function isBuffer(val) {
  return val.constructor
    && typeof val.constructor.isBuffer === 'function'
    && val.constructor.isBuffer(val);
}
If you need to support Safari 5-7 (8-10 yr-old browser),
take a look at https://github.com/feross/is-buffer