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/Node/SandboxedPrintNode.php

@@ -0,0 +1,69 @@
+<?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.
+ */
+
+namespace Twig\Node;
+
+use Twig\Compiler;
+use Twig\Node\Expression\ConstantExpression;
+use Twig\Node\Expression\FilterExpression;
+
+/**
+ * Adds a check for the __toString() method when the variable is an object and the sandbox is activated.
+ *
+ * When there is a simple Print statement, like {{ article }},
+ * and if the sandbox is enabled, we need to check that the __toString()
+ * method is allowed if 'article' is an object.
+ *
+ * Not used anymore, to be deprecated in 2.x and removed in 3.0
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class SandboxedPrintNode extends PrintNode
+{
+    public function compile(Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo ')
+        ;
+        $expr = $this->getNode('expr');
+        if ($expr instanceof ConstantExpression) {
+            $compiler
+                ->subcompile($expr)
+                ->raw(";\n")
+            ;
+        } else {
+            $compiler
+                ->write('$this->env->getExtension(\'\Twig\Extension\SandboxExtension\')->ensureToStringAllowed(')
+                ->subcompile($expr)
+                ->raw(");\n")
+            ;
+        }
+    }
+
+    /**
+     * Removes node filters.
+     *
+     * This is mostly needed when another visitor adds filters (like the escaper one).
+     *
+     * @return Node
+     */
+    protected function removeNodeFilter(Node $node)
+    {
+        if ($node instanceof FilterExpression) {
+            return $this->removeNodeFilter($node->getNode('node'));
+        }
+
+        return $node;
+    }
+}
+
+class_alias('Twig\Node\SandboxedPrintNode', 'Twig_Node_SandboxedPrint');