[COMPOSER] Added predis/predis and updated packages

vendor/php-http/client-common/src/Plugin.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Http\Client\Common;
+
+use Http\Promise\Promise;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * A plugin is a middleware to transform the request and/or the response.
+ *
+ * The plugin can:
+ *  - break the chain and return a response
+ *  - dispatch the request to the next middleware
+ *  - restart the request
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+interface Plugin
+{
+    /**
+     * Handle the request and return the response coming from the next callable.
+     *
+     * @see http://docs.php-http.org/en/latest/plugins/build-your-own.html
+     *
+     * @param RequestInterface $request
+     * @param callable         $next    Next middleware in the chain, the request is passed as the first argument
+     * @param callable         $first   First middleware in the chain, used to to restart a request
+     *
+     * @return Promise Resolves a PSR-7 Response or fails with an Http\Client\Exception (The same as HttpAsyncClient).
+     */
+    public function handleRequest(RequestInterface $request, callable $next, callable $first);
+}