feat: Intl.getCanonicalLocales & supportedValuesOf

Author: illusionalsagacity

src/Core__Intl.res

@@ -4,3 +4,18 @@ module Locale = Core__Intl__Locale
 module NumberFormat = Core__Intl__NumberFormat
 module PluralRules = Core__Intl__PluralRules
 module RelativeTimeFormat = Core__Intl__RelativeTimeFormat
+
+/**
+@throws RangeError
+*/
+external getCanonicalLocalesExn: string => array<string> = "Intl.getCanonicalLocales"
+
+/**
+@throws RangeError
+*/
+external getCanonicalLocalesManyExn: array<string> => array<string> = "Intl.getCanonicalLocales"
+
+/**
+@throws RangeError
+*/
+external supportedValuesOfExn: string => array<string> = "Intl.supportedValuesOf"