docs(readme): link TravisCI badge to travis-ci.com

Author: EdricChan03

README.md

@@ -9,7 +9,7 @@
 <!-- Badges -->
 [![ngx-simple-http@latest](https://img.shields.io/npm/v/ngx-simple-http.svg?style=flat-square)][package-url]
 [![ngx-simple-http@next](https://img.shields.io/npm/v/ngx-simple-http/next.svg?style=flat-square)][package-url]
-[![Build Status](https://img.shields.io/travis/com/Chan4077/ngx-simple-http.svg?style=flat-square)](https://travis-ci.org/Chan4077/ngx-simple-http)
+[![Build Status](https://img.shields.io/travis/com/Chan4077/ngx-simple-http.svg?style=flat-square)](https://travis-ci.com/Chan4077/ngx-simple-http)
 [![GitHub contributors](https://img.shields.io/github/contributors/Chan4077/ngx-simple-http.svg?style=flat-square)](https://github.com/Chan4077/ngx-simple-http/graphs/contributors)
 [![ngx-simple-http license](https://img.shields.io/github/license/Chan4077/ngx-simple-http.svg?style=flat-square)](https://github.com/Chan4077/ngx-simple-http/blob/master/LICENSE)
 [![GitHub last commit](https://img.shields.io/github/last-commit/Chan4077/ngx-simple-http.svg?style=flat-square)](https://github.com/Chan4077/ngx-simple-http/commits)