Create a new major version to avoid problems

Yes. This error is on production version : https://www.drupal.org/project/physical/issues/3345698 📌 Align with the commerceguys/intl changes Fixed

Production version have this issue right now:
Fatal error: Declaration of CommerceGuys\Intl\Formatter\NumberFormatter::format($number, array $options = []) must be compatible with Drupal\physical\NumberFormatterInterface::format(string $number, array $options = []): string in .../public_html/vendor/commerceguys/intl/src/Formatter/NumberFormatter.php on line 68

Installing recommended dev will fix it

This is too late to fix, See https://www.drupal.org/project/physical/issues/3345698#comment-15025989 📌 Align with the commerceguys/intl changes Fixed for a workaround.