Update notifier (#8)

* Update symfony/notifier

* Update symfony/notifier to use >=5.4

* Do not pin version for notifier

Author: dazz

composer.json

@@ -24,7 +24,7 @@
         "symfony/mercure-bundle": "^0.3.2",
         "symfony/messenger": "*",
         "symfony/monolog-bundle": "^3.1",
-        "symfony/notifier": "5.2.*",
+        "symfony/notifier": "*",
         "symfony/process": "*",
         "symfony/property-access": "*",
         "symfony/property-info": "*",