Fix options property builder

Author: bitbager

src/PropertyBuilder/Mapper/ProductTaxonsMapper.php

@@ -27,6 +27,6 @@ public function mapToUniqueCodes(ProductInterface $product): array
             $taxons[] = $taxon->getCode();
         }
 
-        return array_unique($taxons);
+        return array_values(array_unique($taxons));
     }
 }

src/PropertyBuilder/OptionBuilder.php

@@ -65,7 +65,7 @@ private function resolveProductOptions(ProductInterface $product, Document $docu
                 $value = $this->stringFormatter->formatToLowercaseWithoutSpaces($productOptionValue->getValue());
                 $options[] = $value;
 
-                $document->set($index, array_unique($options));
+                $document->set($index, array_values(array_unique($options)));
             }
         }
     }