update lock clucknut

vendor/cuyz/valinor/src/Cache/FileWatchingCache.php

@@ -4,8 +4,10 @@
 
 namespace CuyZ\Valinor\Cache;
 
+use function assert;
 use function file_exists;
 use function filemtime;
+use function is_array;
 use function var_export;
 
 /**
@@ -18,7 +20,7 @@
  * environment, where source files are often modified by developers.
  *
  * It should decorate the original cache implementation and should be given to
- * the mapper builder: @see \CuyZ\Valinor\MapperBuilder::withCache
+ * the mapper builder: {@see \CuyZ\Valinor\MapperBuilder::withCache()}
  *
  * @api
  *
@@ -66,7 +68,11 @@ public function set(string $key, CacheEntry $entry): void
 
         $this->timestamps[$key] = [];
 
-        foreach ($entry->filesToWatch as $fileName) {
+        if ($entry->filesToWatch === null) {
+            return;
+        }
+
+        foreach (($entry->filesToWatch)() as $fileName) {
             $time = @filemtime($fileName);
 
             if (false === $time) {