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

plugins/stripe-php/lib/BaseStripeClientInterface.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Stripe;
+
+/**
+ * Interface for a Stripe client.
+ */
+interface BaseStripeClientInterface
+{
+    /**
+     * Gets the API key used by the client to send requests.
+     *
+     * @return null|string the API key used by the client to send requests
+     */
+    public function getApiKey();
+
+    /**
+     * Gets the client ID used by the client in OAuth requests.
+     *
+     * @return null|string the client ID used by the client in OAuth requests
+     */
+    public function getClientId();
+
+    /**
+     * Gets the base URL for Stripe's API.
+     *
+     * @return string the base URL for Stripe's API
+     */
+    public function getApiBase();
+
+    /**
+     * Gets the base URL for Stripe's OAuth API.
+     *
+     * @return string the base URL for Stripe's OAuth API
+     */
+    public function getConnectBase();
+
+    /**
+     * Gets the base URL for Stripe's Files API.
+     *
+     * @return string the base URL for Stripe's Files API
+     */
+    public function getFilesBase();
+
+    /**
+     * Gets the base URL for Stripe's Meter Events API.
+     *
+     * @return string the base URL for Stripe's Meter Events API
+     */
+    public function getMeterEventsBase();
+}