docs: add shields.io badges per SPEC v1.1

Author: MADEVAL

README.md

@@ -1,5 +1,9 @@
 # GStime JavaScript Library
 
+[![CI](https://github.com/GLOBUS-studio/GStime-JavaScript-Library/actions/workflows/minify.yml/badge.svg)](https://github.com/GLOBUS-studio/GStime-JavaScript-Library/actions/workflows/minify.yml)
+[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![npm](https://img.shields.io/badge/npm-gstime-red.svg)](https://www.npmjs.com/package/gstime)
+
 > **v2.0.0** ships as UMD (browser global, CommonJS, AMD). See [CHANGELOG.md](CHANGELOG.md) for breaking changes from v1.x.
 
 ## Install