[TASK] Make Base62UrlKeyGeneratorTest compatible with PHP 7.4

Author: astehlik

Tests/Unit/UrlKeyGenerator/Base62UrlKeyGeneratorTest.php

@@ -28,9 +28,15 @@ class Base62UrlKeyGeneratorTest extends TestCase
 {
     protected Base62UrlKeyGenerator $base62UrlKeyGenerator;
 
-    protected ExtensionConfiguration|MockObject $extensionConfigurationMock;
-
-    protected GeneralUtilityWrapper|MockObject $generalUtilityMock;
+    /**
+     * @var ExtensionConfiguration|MockObject
+     */
+    protected $extensionConfigurationMock;
+
+    /**
+     * @var GeneralUtilityWrapper|MockObject
+     */
+    protected $generalUtilityMock;
 
     protected function setUp(): void
     {