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/TokenParser/ApplyTokenParser.php

@@ -0,0 +1,58 @@
+<?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\TokenParser;
+
+use Twig\Node\Expression\TempNameExpression;
+use Twig\Node\Node;
+use Twig\Node\PrintNode;
+use Twig\Node\SetNode;
+use Twig\Token;
+
+/**
+ * Applies filters on a section of a template.
+ *
+ *   {% apply upper %}
+ *      This text becomes uppercase
+ *   {% endapplys %}
+ */
+final class ApplyTokenParser extends AbstractTokenParser
+{
+    public function parse(Token $token)
+    {
+        $lineno = $token->getLine();
+        $name = $this->parser->getVarName();
+
+        $ref = new TempNameExpression($name, $lineno);
+        $ref->setAttribute('always_defined', true);
+
+        $filter = $this->parser->getExpressionParser()->parseFilterExpressionRaw($ref, $this->getTag());
+
+        $this->parser->getStream()->expect(Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse([$this, 'decideApplyEnd'], true);
+        $this->parser->getStream()->expect(Token::BLOCK_END_TYPE);
+
+        return new Node([
+            new SetNode(true, $ref, $body, $lineno, $this->getTag()),
+            new PrintNode($filter, $lineno, $this->getTag()),
+        ]);
+    }
+
+    public function decideApplyEnd(Token $token)
+    {
+        return $token->test('endapply');
+    }
+
+    public function getTag()
+    {
+        return 'apply';
+    }
+}