fix wpcfto select and repeater related visibility and validation

includes/Integration/ExchangeRateAPI.php

@@ -0,0 +1,10 @@
+<?php
+namespace Formipay\Integration;
+use Formipay\Traits\SingletonTrait;
+use Formipay\Payment\Payment;
+// Exit if accessed directly
+if ( ! defined( 'ABSPATH' ) ) exit;
+
+class ExchangeRateAPI extends Payment {
+    
+}