Update PHPUnit version requirement to include 13.0 (#790)

Author: dereuromark

composer.json

@@ -36,7 +36,7 @@
         "cakephp/cakephp": "^5.1.0",
         "cakephp/cakephp-codesniffer": "^5.0",
         "firebase/php-jwt": "^7.0",
-        "phpunit/phpunit": "^10.5.58 || ^11.5.3 || ^12.4"
+        "phpunit/phpunit": "^10.5.58 || ^11.5.3 || ^12.4 || ^13.0"
     },
     "suggest": {
         "ext-ldap": "Make sure this php extension is installed and enabled on your system if you want to use the built-in LDAP adapter for \"LdapIdentifier\".",