add in the same line

Author: js1010

README.md

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 # CUSIM
 
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
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-[![Build Status](https://travis-ci.org/cusim.svg?branch=main)](https://travis-ci.org/js1010/cusim)
-
-[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/dwyl/learn-travis/issues)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Build Status](https://travis-ci.org/js1010/cusim.svg?branch=main)](https://travis-ci.org/js1010/cusim) [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/dwyl/learn-travis/issues)
 
 ### Introduction