migration symfony 5 4 (#300)

* symfony 5.4 (diff dev)

* symfony 5.4 (working)

* symfony 5.4 (update autoload)

* symfony 5.4 (remove swiftmailer mailer implementation)

* symfony 5.4 (php doc and split Global accessor class)


### Impacted packages:

composer require php:">=7.2.5 <8.0.0" symfony/console:5.4.* symfony/dotenv:5.4.* symfony/framework-bundle:5.4.* symfony/twig-bundle:5.4.* symfony/yaml:5.4.* --update-with-dependencies

composer require symfony/stopwatch:5.4.* symfony/web-profiler-bundle:5.4.* --dev --update-with-dependencies

lib/symfony/cache/Traits/RedisClusterNodeProxy.php

@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Cache\Traits;
+
+/**
+ * This file acts as a wrapper to the \RedisCluster implementation so it can accept the same type of calls as
+ *  individual \Redis objects.
+ *
+ * Calls are made to individual nodes via: RedisCluster->{method}($host, ...args)'
+ *  according to https://github.com/phpredis/phpredis/blob/develop/cluster.markdown#directed-node-commands
+ *
+ * @author Jack Thomas <jack.thomas@solidalpha.com>
+ *
+ * @internal
+ */
+class RedisClusterNodeProxy
+{
+    private $host;
+    private $redis;
+
+    /**
+     * @param \RedisCluster|RedisClusterProxy $redis
+     */
+    public function __construct(array $host, $redis)
+    {
+        $this->host = $host;
+        $this->redis = $redis;
+    }
+
+    public function __call(string $method, array $args)
+    {
+        return $this->redis->{$method}($this->host, ...$args);
+    }
+
+    public function scan(&$iIterator, $strPattern = null, $iCount = null)
+    {
+        return $this->redis->scan($iIterator, $this->host, $strPattern, $iCount);
+    }
+
+    public function getOption($name)
+    {
+        return $this->redis->getOption($name);
+    }
+}