stylelint-bundle-worker.js
function append(compiler, val, node) {
  if (typeof compiler.append !== 'function') {
    return compiler.emit(val, node);
  }
  return compiler.append(val, node);
}
function append(compiler, val, node) {
  if (typeof compiler.append !== 'function') {
    return compiler.emit(val, node);
  }
  return compiler.append(val, node);
}
Shim to ensure the `.append` methods work with any version of snapdragon