We are a service that monitors for vulnerabilities in WordPress plugins and your library came on to our radar when a file from the library that was being removed from plugin that uses the library was flagged by our monitoring as possibly containing a serious security vulnerability. In looking into that we found that for 22 months having the file /tests/PHPCurlClass/server.php from the library included in that plugin had introduced an arbitrary file viewing vulnerability, arbitrary file deletion, and a restricted file upload vulnerability on to websites using this plugin. It would be a good idea to make sure the file is secured in such a way that if it is included production websites (as it was with that plugin) it can't be abused, because right now it isn't secure.