fix tests

Author: mmasiukevich

tests/Stubs/Author.php

@@ -17,9 +17,15 @@
  */
 final class Author
 {
-    public string $firstName;
+    /**
+     * @var string
+     */
+    public $firstName;
 
-    public string $lastName;
+    /**
+     * @var string
+     */
+    public $lastName;
 
     public static function create(string $firstName, string $lastName): self
     {

tests/Stubs/TestMessage.php

@@ -21,6 +21,7 @@ final class TestMessage
      * @var string
      */
     private $componentName;
+
     /**
      * @var string|null
      */