add test badge

Author: John B

README.md

@@ -1,5 +1,6 @@
 [![npm version](https://img.shields.io/npm/v/@nexys/utils.svg)](https://www.npmjs.com/package/@nexys/utils)
 [![TavisCI](https://travis-ci.com/Nexysweb/utils.svg?branch=master)](https://travis-ci.com/Nexysweb/utils)
+![Test Package](https://github.com/Nexysweb/utils/workflows/Test%20Package/badge.svg)
 ![Publish](https://github.com/Nexysweb/utils/workflows/Publish/badge.svg)
 [![Bundlephobia](https://badgen.net/bundlephobia/min/@nexys/utils)](https://bundlephobia.com/result?p=@nexys/utils)
 ![Code style](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)