message: MINOR: Fixed release error due to old ncp version
diff: @@ -9,7 +9,7 @@ import * as path from "path";
  // tslint:disable:no-console
  -function onCopyError(err: Error[] | null) {
  +function onCopyError(err: Error) {
  if (err === null) {
  return;
  }
  