update renamed rector config

Author: samsonasik

rector.php

@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 use Rector\Config\RectorConfig;
-use Rector\DeadCode\Rector\FunctionLike\NarrowTooWideReturnTypeRector;
+use Rector\DeadCode\Rector\FunctionLike\NarrowWideUnionReturnTypeRector;
 use Rector\TypeDeclaration\Rector\ClassMethod\BoolReturnTypeFromBooleanStrictReturnsRector;
 
 return RectorConfig::configure()
@@ -22,7 +22,7 @@
         BoolReturnTypeFromBooleanStrictReturnsRector::class => [
             __DIR__ . '/tests/FilterTest.php',
         ],
-        NarrowTooWideReturnTypeRector::class                => [
+        NarrowWideUnionReturnTypeRector::class              => [
             __DIR__ . '/tests/FilterTest.php',
         ],
     ])