See https://tc39.github.io/proposal-intl-locale/#sec-canonicalizelocalelist

This is due to the fact we now only accept Unicode Locale Identifier in
UTS 35.

Sync with https://github.com/tc39/proposal-intl-list-format/pull/36

https://github.com/tc39/proposal-intl-segmenter/pull/55

Increase coverage for the Intl.DateTimeFormat constructor by adding a
test that confirms that ToObject(...) is appropriately called inside the
implementation.

Increase coverage for the Intl.DateTimeFormat constructor by adding a
test that checks for the default values.

Based on: https://github.com/tc39/test262/blob/44fc8165d54de9c9f0128f70eda56bdcb5dde82c/implementation-contributed/v8/intl/segmenter/segment-iterator-ownPropertyDescriptor.js

Fix wrong expectations of
Intl.RelativeTimeFormat.prototype.formatToParts
Add tests to cover "group", "decimal" and "fraction".

Fixes #1904

Ref: https://github.com/tc39/ecma402/issues/256.

This reverts commit c49c3567.

The order was defined in <https://github.com/tc39/ecma402/pull/279>.

This reverts commit a1c3929c.

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.