Bump dependencies & fix explicit nullables

Author: tvdijen

composer.json

@@ -37,14 +37,14 @@
         "php": "^8.1",
         "ext-krb5": ">=1.1.5",
 
-        "simplesamlphp/assert": "^1.2.0",
-        "simplesamlphp/composer-module-installer": "^1.3.4",
-        "simplesamlphp/simplesamlphp": "^2.2.0",
-        "simplesamlphp/simplesamlphp-module-ldap": "^2.3.6",
+        "simplesamlphp/assert": "~1.8.1",
+        "simplesamlphp/composer-module-installer": "~1.3.6",
+        "simplesamlphp/simplesamlphp": "^2.4.0",
+        "simplesamlphp/simplesamlphp-module-ldap": "^2.4.6",
         "symfony/http-foundation": "^6.4.0"
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp-test-framework": "^1.7.9"
+        "simplesamlphp/simplesamlphp-test-framework": "^1.9.2"
     },
     "support": {
         "issues": "https://github.com/simplesamlphp/simplesamlphp-module-negotiate/issues",

src/Auth/Source/Negotiate.php

@@ -246,7 +246,7 @@ public function authenticate(array &$state): void
     }
 
 
-    private function doAuthentication(KRB5NegotiateAuth $auth, string $hash = null): bool
+    private function doAuthentication(KRB5NegotiateAuth $auth, ?string $hash = null): bool
     {
         if ($this->enforceChannelBinding === true && ($hash === null)) {
             throw new Error\Exception(

tests/src/Controller/NegotiateControllerTest.php

@@ -271,7 +271,7 @@ public function authenticate(array &$state): void
                 // stub
             }
 
-            public static function getById(string $authId, string $type = null): ?Source
+            public static function getById(string $authId, ?string $type = null): ?Source
             {
                 return null;
             }