✅ Make unit tests working

lib/symfony/polyfill-intl-icu/NumberFormatter.php

@@ -340,7 +340,7 @@ abstract class NumberFormatter
      * @param int       $type Type of the formatting, one of the format type constants.
      *                        Only type NumberFormatter::TYPE_DEFAULT is currently supported.
      *
-     * @return bool|string The formatted value or false on error
+     * @return false|string The formatted value or false on error
      *
      * @see https://php.net/numberformatter.format
      *

lib/symfony/polyfill-intl-icu/Resources/currencies.php

@@ -1219,6 +1219,10 @@ return array (
   array (
     0 => 'EC$',
   ),
+  'XCG' => 
+  array (
+    0 => 'Cg.',
+  ),
   'XEU' => 
   array (
     0 => 'XEU',
@@ -1305,6 +1309,10 @@ return array (
     1 => 0,
     2 => 0,
   ),
+  'ZWG' => 
+  array (
+    0 => 'ZWG',
+  ),
   'ZWL' => 
   array (
     0 => 'ZWL',