Add missing import

Author: swissspidy

tests/tests/PHPStan/TestDynamicReturnTypeExtension.php

@@ -4,6 +4,8 @@
 
 namespace WP_CLI\Tests\Tests\PHPStan;
 
+use PHPUnit\Framework\Attributes\DataProvider;
+
 class TestDynamicReturnTypeExtension extends \PHPStan\Testing\TypeInferenceTestCase {
 
 	/**