Completely migrate repo to travis-ci.com

Author: razvancrainea

README.md

@@ -1,5 +1,5 @@
 [![Build Status@GitHub](https://github.com/OpenSIPS/opensips/workflows/Main%20CI/badge.svg?branch=master)](https://github.com/OpenSIPS/opensips/actions?query=branch%3Amaster++)
-[![Build Status@TravisCI](https://travis-ci.com/OpenSIPS/opensips.svg?branch=master)](https://travis-ci.org/OpenSIPS/opensips)
+[![Build Status@TravisCI](https://travis-ci.com/OpenSIPS/opensips.svg?branch=master)](https://travis-ci.com/OpenSIPS/opensips)
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/7580/badge.svg)](https://scan.coverity.com/projects/opensips-opensips)
 [![Code Quality: Cpp](https://img.shields.io/lgtm/grade/cpp/g/OpenSIPS/opensips.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/OpenSIPS/opensips/context:cpp)
 [![Total Alerts](https://img.shields.io/lgtm/alerts/g/OpenSIPS/opensips.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/OpenSIPS/opensips/alerts)