[misc] correcting travis-ci link

Author: rusher

README.md

@@ -145,8 +145,8 @@ If you would like to contribute to the MariaDB Node.js Connector, please follow
 To file an issue or follow the development, see [JIRA](https://jira.mariadb.org/projects/CONJS/issues/).
 
 
-[travis-image]:https://travis-ci.org/mariadb-corporation/mariadb-connector-nodejs.svg?branch=master
-[travis-url]:https://travis-ci.org/mariadb-corporation/mariadb-connector-nodejs
+[travis-image]:https://travis-ci.com/mariadb-corporation/mariadb-connector-nodejs.svg?branch=master
+[travis-url]:https://travis-ci.com/mariadb-corporation/mariadb-connector-nodejs
 [npm-image]:https://img.shields.io/npm/v/mariadb.svg
 [npm-url]:http://npmjs.org/package/mariadb
 [appveyor-image]:https://ci.appveyor.com/api/projects/status/558kpv0j1r545pgq/branch/master?svg=true