Update to PHP 8.1 syntax

rector.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\Set\ValueObject\LevelSetList;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->paths([
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ]);
+
+    $rectorConfig->sets([
+        LevelSetList::UP_TO_PHP_81
+    ]);
+};

src/Checker/StaticConsentChecker.php

@@ -8,15 +8,12 @@
 
 final class StaticConsentChecker implements ConsentCheckerInterface
 {
-    /** @var array<string, bool> */
-    private array $consents;
-
-    /**
-     * @param array<string, bool> $consents
-     */
-    public function __construct(array $consents)
-    {
-        $this->consents = $consents;
+    public function __construct(
+        /**
+         * @var array<string, bool> $consents
+         */
+        private readonly array $consents,
+    ) {
     }
 
     public function isGranted(string $consent): bool