This was changed in https://github.com/tc39/proposal-intl-list-format/pull/27.

* Changes Intl.ListFormat tests reflecting spec

Reflect https://github.com/tc39/proposal-intl-list-format/pull/27
while style:"narrow" and type is not "unit".

* add cases for throws

* remove commetns which cause lint error

This was added in https://github.com/tc39/proposal-intl-list-format/pull/25.

I don't know how to test that the option has any effect, so this just checks
that it is read and verified.

Fixes #1705.

The specification changed in https://github.com/tc39/proposal-intl-list-format/pull/13.