FIX: Check if invoice exists before sending, if exists then save

Send correct UF amount if date in future

app/src/Service/Venta/MediosPago/Toku/Customer.php

@@ -42,7 +42,7 @@ class Customer extends AbstractEndPoint
         $this->sendDelete($request_uri, [204], [404, 409]);
     }
 
-    protected function save(array $data): bool
+    public function save(array $data): bool
     {
         return $this->doSave($this->customerRepository, $data);
     }