Bump plugin stripe-php from 10.5.0 to 16.4.0 and update links

plugins/stripe-php/lib/Exception/UnknownApiErrorException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Stripe\Exception;
+
+/**
+ * UnknownApiErrorException is thrown when the client library receives an
+ * error from the API it doesn't know about. Receiving this error usually
+ * means that your client library is outdated and should be upgraded.
+ */
+class UnknownApiErrorException extends ApiErrorException
+{
+}