Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/vendor/twig/Markup.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a content as safe.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Markup implements Countable
+{
+    protected $content;
+    protected $charset;
+
+    public function __construct($content, $charset)
+    {
+        $this->content = (string) $content;
+        $this->charset = $charset;
+    }
+
+    public function __toString()
+    {
+        return $this->content;
+    }
+
+    public function count()
+    {
+        return function_exists('mb_get_info') ? mb_strlen($this->content, $this->charset) : strlen($this->content);
+    }
+}