Sentence break suppressions

[FrankYFTang]

https://unicode.org/reports/tr35/#UnicodeSentenceBreakSuppressionsIdentifier

Unicode Sentence Break Suppressions Identifier defines a set of data to be used for suppressing certain sentence breaks that would otherwise be found by UAX #14 rules. The valid values are those name attribute values in the type elements of key name="ss" in bcp47/segmentation.xml.

"ss" | Sentence break suppressions | "none" | Don’t use sentence break suppressions data (the default).
"standard" | Use sentence break suppressions data of type "standard"

should we add an option to support this and change
https://tc39.es/proposal-intl-segmenter/#sec-intl.segmenter-internal-slots

to
"The value of the [[RelevantExtensionKeys]] internal slot is « "ss" »." ?

https://tc39.es/proposal-intl-segmenter/#sec-intl.segmenter-internal-slots