⬇️ Restore php-parser to its original version as tests are failing :/

lib/nikic/php-parser/lib/PhpParser/NodeVisitorAbstract.php

@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 
 namespace PhpParser;
 
@@ -7,19 +7,8 @@ namespace PhpParser;
  */
 class NodeVisitorAbstract implements NodeVisitor
 {
-    public function beforeTraverse(array $nodes) {
-        return null;
-    }
-
-    public function enterNode(Node $node) {
-        return null;
-    }
-
-    public function leaveNode(Node $node) {
-        return null;
-    }
-
-    public function afterTraverse(array $nodes) {
-        return null;
-    }
-}
+    public function beforeTraverse(array $nodes)    { }
+    public function enterNode(Node $node) { }
+    public function leaveNode(Node $node) { }
+    public function afterTraverse(array $nodes)     { }
+}