upgrade

vendor/symfony/expression-language/Tests/ExpressionTest.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\ExpressionLanguage\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\ExpressionLanguage\Expression;
+
+class ExpressionTest extends TestCase
+{
+    public function testSerialization()
+    {
+        $expression = new Expression('kernel.boot()');
+
+        $serializedExpression = serialize($expression);
+        $unserializedExpression = unserialize($serializedExpression);
+
+        $this->assertEquals($expression, $unserializedExpression);
+    }
+}