Fix: Add test case

Related to #893.

test/Fixture/Methods/PrivateInFinalClassRule/script.php

@@ -15,6 +15,14 @@ protected function method(): void
 };
 
 $baz = new class() {
+    use TraitWithProtectedMethod;
+
+    protected function method(): void
+    {
+    }
+};
+
+$qux = new class() {
     use TraitWithAbstractProtectedMethod;
 
     protected function method(): void

test/Integration/Methods/PrivateInFinalClassRuleTest.php

@@ -74,6 +74,10 @@ public function testPrivateInFinalClassRule(): void
                     'Method method() in anonymous class is protected, but since the containing class is final, it can be private.',
                     20,
                 ],
+                [
+                    'Method method() in anonymous class is protected, but since the containing class is final, it can be private.',
+                    28,
+                ],
             ],
         );
     }