Merge branch 'dev' of dev.quiqqer.com:quiqqer/erp into dev

src/QUI/ERP/Accounting/PriceFactors/FactorList.php

@@ -97,7 +97,7 @@ public function toJSON(): string
      *
      * @return ArrayIterator|Traversable
      */
-    public function getIterator()
+    public function getIterator(): \Traversable
     {
         return new ArrayIterator($this->list);
     }