Fix alphabetic order of currencies list

src/MDCurrenciesSet.php

@@ -13,6 +13,8 @@ final class MDCurrenciesSet extends MDValueSet {
 
     const CURRENCIES = [
         '',
+        "ddr-Mark",
+        "ddr-MDN",
         "de-DM",
         "de-RM",
         "es-Real",
@@ -23,8 +25,6 @@ final class MDCurrenciesSet extends MDValueSet {
         'hu-Pengő',
         "pl-Złoty",
         "us-USD",
-        "ddr-Mark",
-        "ddr-MDN",
     ];
 
     /**