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

plugins/stripe-php/lib/StripeClientInterface.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Stripe;
+
+/**
+ * Interface for a Stripe client.
+ */
+interface StripeClientInterface extends BaseStripeClientInterface
+{
+    /**
+     * Sends a request to Stripe's API.
+     *
+     * @param 'delete'|'get'|'post' $method the HTTP method
+     * @param string $path the path of the request
+     * @param array $params the parameters of the request
+     * @param array|\Stripe\Util\RequestOptions $opts the special modifiers of the request
+     *
+     * @return \Stripe\StripeObject the object returned by Stripe's API
+     */
+    public function request($method, $path, $params, $opts);
+}