Actualización

vendor/symfony/cache/Simple/Psr6Cache.php

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+<?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\Simple;
+
+use Symfony\Component\Cache\Psr16Cache;
+
+@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.3, use "%s" instead.', Psr6Cache::class, Psr16Cache::class), E_USER_DEPRECATED);
+
+/**
+ * @deprecated since Symfony 4.3, use Psr16Cache instead.
+ */
+class Psr6Cache extends Psr16Cache
+{
+}