Update composer dependencies

vendor/ezyang/htmlpurifier/maintenance/common.php

@@ -0,0 +1,25 @@
+<?php
+
+function assertCli()
+{
+    if (php_sapi_name() != 'cli' && !getenv('PHP_IS_CLI')) {
+        echo 'Script cannot be called from web-browser (if you are indeed calling via cli,
+set environment variable PHP_IS_CLI to work around this).';
+        exit(1);
+    }
+}
+
+function prefix_is($comp, $subject)
+{
+    return strncmp($comp, $subject, strlen($comp)) === 0;
+}
+
+function postfix_is($comp, $subject)
+{
+    return strlen($subject) < $comp ? false : substr($subject, -strlen($comp)) === $comp;
+}
+
+// Load useful stuff like FSTools
+require_once dirname(__FILE__) . '/../extras/HTMLPurifierExtras.auto.php';
+
+// vim: et sw=4 sts=4