Return StringArrayMap on Locale.useLocale for compatibility with previous

Author: mjradwin

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hebcal/hdate",
-  "version": "0.9.8",
+  "version": "0.9.9",
   "description": "converts between Hebrew and Gregorian dates using Rata Die (R.D.) algorithm by Dershowitz and Reingold",
   "author": "Michael J. Radwin (https://github.com/mjradwin)",
   "contributors": [

src/locale.ts

@@ -145,14 +145,15 @@ export class Locale {
    * will be represented by the corresponding translation in the specified locale.
    * @param {string} locale Locale name (i.e: `'he'`, `'fr'`)
    */
-  static useLocale(locale: string): void {
+  static useLocale(locale: string): StringArrayMap {
     const locale0 = locale.toLowerCase();
     const obj = locales.get(locale0);
     if (!obj) {
       throw new RangeError(`Locale '${locale}' not found`);
     }
     activeName = alias[locale0] || locale0;
     activeLocale = obj;
+    return activeLocale;
   }
 
   /**