Update Travis CI link in README.md
-# SDL2 binding for Go [![Build Status](https://travis-ci.org/veandco/go-sdl2.svg?branch=master)](https://travis-ci.org/veandco/go-sdl2) [![Go Report Card](https://goreportcard.com/badge/github.com/veandco/go-sdl2)](https://goreportcard.com/report/github.com/veandco/go-sdl2) [![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com) [![Financial Contributors on Open Collective](https://opencollective.com/veandco/all/badge.svg?label=financial+contributors)](https://opencollective.com/veandco)
+# SDL2 binding for Go [![Build Status](https://app.travis-ci.com/veandco/go-sdl2.svg?branch=master)](https://app.travis-ci.com/github/veandco/go-sdl2) [![Go Report Card](https://goreportcard.com/badge/github.com/veandco/go-sdl2)](https://goreportcard.com/report/github.com/veandco/go-sdl2) [![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com) [![Financial Contributors on Open Collective](https://opencollective.com/veandco/all/badge.svg?label=financial+contributors)](https://opencollective.com/veandco)
`go-sdl2` is SDL2 wrapped for Go users. It enables interoperability between Go and the SDL2 library which is written in C. That means the original SDL2 installation is required for this to work.
