Update to latest PHP 8.1 syntax

src/CsrfMiddleware.php

@@ -25,8 +25,8 @@ class CsrfMiddleware implements MiddlewareInterface
     public const GUARD_ATTRIBUTE = 'csrf';
 
     public function __construct(
-        private CsrfGuardFactoryInterface $guardFactory,
-        private string $attributeKey = self::GUARD_ATTRIBUTE
+        private readonly CsrfGuardFactoryInterface $guardFactory,
+        private readonly string $attributeKey = self::GUARD_ATTRIBUTE
     ) {
     }
 

src/FlashCsrfGuard.php

@@ -11,7 +11,7 @@
 
 class FlashCsrfGuard implements CsrfGuardInterface
 {
-    public function __construct(private FlashMessagesInterface $flashMessages)
+    public function __construct(private readonly FlashMessagesInterface $flashMessages)
     {
     }
 

src/FlashCsrfGuardFactory.php

@@ -10,7 +10,7 @@
 
 class FlashCsrfGuardFactory implements CsrfGuardFactoryInterface
 {
-    public function __construct(private string $attributeKey = FlashMessageMiddleware::FLASH_ATTRIBUTE)
+    public function __construct(private readonly string $attributeKey = FlashMessageMiddleware::FLASH_ATTRIBUTE)
     {
     }
 

src/SessionCsrfGuard.php

@@ -11,7 +11,7 @@
 
 class SessionCsrfGuard implements CsrfGuardInterface
 {
-    public function __construct(private SessionInterface $session)
+    public function __construct(private readonly SessionInterface $session)
     {
     }
 

src/SessionCsrfGuardFactory.php

@@ -10,7 +10,7 @@
 
 class SessionCsrfGuardFactory implements CsrfGuardFactoryInterface
 {
-    public function __construct(private string $attributeKey = SessionMiddleware::SESSION_ATTRIBUTE)
+    public function __construct(private readonly string $attributeKey = SessionMiddleware::SESSION_ATTRIBUTE)
     {
     }