Fix PHP7 compat

Author: staabm

src/Rules/PHPUnit/DataProviderHelper.php

@@ -24,8 +24,10 @@
 use function array_merge;
 use function count;
 use function explode;
+use function method_exists;
 use function preg_match;
 use function sprintf;
+use const PHP_VERSION_ID;
 
 class DataProviderHelper
 {
@@ -274,7 +276,13 @@ private function parseDataProviderAttribute(Attribute $attribute, ClassReflectio
 	 */
 	private function yieldDataProviderAttributes($node, ClassReflection $classReflection): iterable
 	{
-		if ($node instanceof ReflectionMethod) {
+		if (
+			$node instanceof ReflectionMethod
+		) {
+			if (PHP_VERSION_ID < 80000) {
+				return;
+			}
+
 			foreach ($node->getAttributes('PHPUnit\Framework\Attributes\DataProvider') as $attr) {
 				$args = $attr->getArguments();
 				if (count($args) !== 1) {