Update link to continuous integration

Author: zachborboa

README.md

@@ -2,7 +2,7 @@
 
 [![](https://img.shields.io/github/release/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
 [![](https://img.shields.io/github/license/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/blob/master/LICENSE)
-[![](https://img.shields.io/travis/php-curl-class/php-curl-class.svg)](https://travis-ci.org/php-curl-class/php-curl-class/)
+[![](https://img.shields.io/travis/php-curl-class/php-curl-class.svg)](https://travis-ci.com/github/php-curl-class/php-curl-class/)
 [![](https://img.shields.io/packagist/dt/php-curl-class/php-curl-class.svg)](https://github.com/php-curl-class/php-curl-class/releases/)
 
 PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs.