Update README.md

Author: adalisan

README.md

@@ -10,5 +10,5 @@
 | Resource:     | CRAN        | Travis CI       | Appveyor         |
 | ------------- | ------------------- | --------------- | ---------------- |
 | _Platforms:_  | _Linux & Windows_          | _Linux | _Windows_        |
-| R CMD check   | <a href="https://cran.r-project.org/web/checks/check_results_RGraphM.html"><img border="0" src="http://www.r-pkg.org/badges/version/RGraphM" alt="CRAN version"></a> | <a href="https://travis-ci.org/adalisan/RGraphM"><img src="https://travis-ci.org/adalisan/RGraphM.svg" alt="Build status"></a>   | |
+| R CMD check   | <a href="https://cran.r-project.org/web/checks/check_results_RGraphM.html"><img border="0" src="http://www.r-pkg.org/badges/version/RGraphM" alt="CRAN version"></a> | <a href="https://travis-ci.org/adalisan/RGraphM"><img src="https://travis-ci.org/adalisan/RGraphM.svg" alt="Build status"></a>   | [![Build status](https://ci.appveyor.com/api/projects/status/clff6yu0d622fdgi?svg=true)](https://ci.appveyor.com/project/adalisan/rgraphm)|
 | Test coverage |                     |     |