Update Twig from 1.35.0 to 1.42.4 (PHP 5.5 is now required!)

This fixes some errors on PHP 7.4 and contains even more fixes
Also bumped PHP version to 5.5 as Twig requires it.

system/libs/Twig/Twig/Test/Function.php

@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test_Function class is deprecated since version 1.12 and will be removed in 2.0. Use \Twig\TwigTest instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a function template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Function extends Twig_Test
+{
+    protected $function;
+
+    public function __construct($function, array $options = [])
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}

system/libs/Twig/Twig/Test/IntegrationTestCase.php

@@ -0,0 +1,11 @@
+<?php
+
+use Twig\Test\IntegrationTestCase;
+
+class_exists('Twig\Test\IntegrationTestCase');
+
+if (\false) {
+    class Twig_Test_IntegrationTestCase extends IntegrationTestCase
+    {
+    }
+}

system/libs/Twig/Twig/Test/Method.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Twig\Extension\ExtensionInterface;
+
+@trigger_error('The Twig_Test_Method class is deprecated since version 1.12 and will be removed in 2.0. Use \Twig\TwigTest instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a method template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Method extends Twig_Test
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(ExtensionInterface $extension, $method, array $options = [])
+    {
+        $options['callable'] = [$extension, $method];
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', \get_class($this->extension), $this->method);
+    }
+}

system/libs/Twig/Twig/Test/Node.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test_Node class is deprecated since version 1.12 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template test as a Node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Node extends Twig_Test
+{
+    protected $class;
+
+    public function __construct($class, array $options = [])
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}

system/libs/Twig/Twig/Test/NodeTestCase.php

@@ -0,0 +1,11 @@
+<?php
+
+use Twig\Test\NodeTestCase;
+
+class_exists('Twig\Test\NodeTestCase');
+
+if (\false) {
+    class Twig_Test_NodeTestCase extends NodeTestCase
+    {
+    }
+}