upgrade to phpstan lvl 8

src/Support/Closure.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Support;
+
+use Pest\Exceptions\ShouldNotHappen;
+
+/**
+ * @internal
+ */
+final class Closure
+{
+    public static function safeBind(\Closure|null $closure, ?object $newThis, object|string|null $newScope = 'static'): \Closure
+    {
+        if ($closure == null) {
+            throw ShouldNotHappen::fromMessage('Could not bind null closure.');
+        }
+
+        $closure = \Closure::bind($closure, $newThis, $newScope);
+
+        if ($closure == false) {
+            throw ShouldNotHappen::fromMessage('Could not bind closure.');
+        }
+
+        return $closure;
+    }
+}