add symfony/polyfill-intl-icu

composer.json

@@ -47,6 +47,7 @@
         "symfony/mercure": "^0.6.1",
         "symfony/mercure-bundle": "^0.3.4",
         "symfony/monolog-bundle": "^3.7",
+        "symfony/polyfill-intl-icu": "^1.21",
         "symfony/polyfill-intl-messageformatter": "^1.24",
         "symfony/property-access": "5.4.*",
         "symfony/property-info": "5.4.*",