Auto loading phpunit class

to fix `PHP Fatal error:  Class 'PHPUnit_Framework_TestCase' not found ` in php 7

Author: mebjas

test/csrfprotector_test.php

@@ -1,5 +1,6 @@
 <?php
 date_default_timezone_set('UTC');
+require_once 'PHPUnit/Autoload.php';
 require_once __DIR__ .'/../libs/csrf/csrfprotector.php';
 
 /**
@@ -439,4 +440,4 @@ public function testModCSRFPEnabledException()
         $this->assertTrue($temp == $_SESSION[csrfprotector::$config['CSRFP_TOKEN']][0]);
         $this->assertTrue($temp == $_COOKIE[csrfprotector::$config['CSRFP_TOKEN']]);
     }
-}
+}