add locale check

Author: rotsee

lib/cldr.js

@@ -839,6 +839,7 @@ Cldr.prototype = {
   },
 
   extractDayPeriodRules(localeId) {
+    this.checkValidLocaleId(localeId);
     const document = this.getDocument(
       Path.resolve(this.cldrPath, 'common', 'supplemental', 'dayPeriods.xml'),
     );