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

plugins/stripe-php/lib/HttpClient/ClientInterface.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Stripe\HttpClient;
+
+interface ClientInterface
+{
+    /**
+     * @param 'delete'|'get'|'post' $method The HTTP method being used
+     * @param string $absUrl The URL being requested, including domain and protocol
+     * @param array $headers Headers to be used in the request (full strings, not KV pairs)
+     * @param array $params KV pairs for parameters. Can be nested for arrays and hashes
+     * @param bool $hasFile Whether or not $params references a file (via an @ prefix or
+     *                         CURLFile)
+     * @param 'v1'|'v2' $apiMode Specifies if this is a v1 or v2 request
+     *
+     * @throws \Stripe\Exception\ApiConnectionException
+     * @throws \Stripe\Exception\UnexpectedValueException
+     *
+     * @return array an array whose first element is raw request body, second
+     *    element is HTTP status code and third array of HTTP headers
+     */
+    public function request($method, $absUrl, $headers, $params, $hasFile, $apiMode = 'v1');
+}