chore: PHP8.4 compatability updates

hellopablo · hellopablo · commit 66fda1b6c61b · 2025-06-03T20:58:11.000+01:00
diff --git a/src/GoCardless.php b/src/GoCardless.php
@@ -149,7 +149,7 @@ public function charge(
         string $sSuccessUrl,
         string $sErrorUrl,
         bool $bCustomerPresent,
-        Resource\Source $oSource = null
+        ?Resource\Source $oSource = null
     ): ChargeResponse {
 
         /** @var ChargeResponse $oChargeResponse */
