Stale artefact check now considers directory last modification time as well

artefact.inc.php

@@ -379,12 +379,12 @@ class TaskmanDirFiles implements \ArrayAccess, \Countable, \Iterator
   }
 }
 
-function is_stale(string $file, iterable $deps) : bool
+function is_stale(string $path, iterable $deps) : bool
 {
-  if(!is_file($file))
+  if(!is_file($path) && !is_dir($path))
     return true;
 
-  $fmtime = filemtime($file); 
+  $fmtime = filemtime($path); 
 
   foreach($deps as $dep)
   {