Fix dependency conflict

Author: tvdijen

composer.json

@@ -23,6 +23,7 @@
     "require": {
         "php": "^8.2",
         "ext-curl": "*",
+        "ext-sodium": "*",
 
         "icanhazstring/composer-unused": "^0.9",
         "maglnet/composer-require-checker": "^4.18.0",
@@ -37,7 +38,7 @@
         "symfony/phpunit-bridge": "^7.3 || ^8.0"
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp": "^2.4"
+        "simplesamlphp/simplesamlphp": "^2.5@dev"
     },
     "support": {
         "issues": "https://github.com/simplesamlphp/simplesamlphp-test-framework/issues",