Fix test suite

Author: jhaoda

phpunit.xml.dist

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="tests/bootstrap.php"
+<phpunit bootstrap="vendor/autoload.php"
          backupGlobals="false"
          backupStaticAttributes="false"
          colors="true"