see spec change in
https://github.com/tc39/ecma402/pull/278/

Bug: v8:8398
Change-Id: If5582f96d6dc3debdccb466d3d239efa52bbbf06
Reviewed-on: https://chromium-review.googlesource.com/c/1404436
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58717}