fix travis domain

Author: mathiask88

README.md

@@ -2,7 +2,7 @@
 
 [![npm](https://img.shields.io/npm/v/node-snap7.svg?label=&logo=npm)](https://www.npmjs.com/package/node-snap7)
 [![Node version](https://img.shields.io/node/v/node-snap7.svg)](https://www.npmjs.com/package/node-snap7)
-[![Travis](https://img.shields.io/travis/mathiask88/node-snap7.svg?logo=travis&label=)](https://travis-ci.com/mathiask88/node-snap7)
+[![Travis](https://img.shields.io/travis/mathiask88/node-snap7.svg?logo=travis&label=)](https://travis-ci.org/mathiask88/node-snap7)
 [![AppVeyor](https://img.shields.io/appveyor/ci/mathiask88/node-snap7.svg?logo=appveyor&label=)](https://ci.appveyor.com/project/mathiask88/node-snap7)
 [![npm](https://img.shields.io/npm/dm/node-snap7.svg?label=dl)](https://www.npmjs.com/package/node-snap7)