doc update

README.md

@@ -1,4 +1,9 @@
-### Finnish Person ID check [![Build Status](https://travis-ci.org/mharj/hetu.svg?branch=master)](https://travis-ci.org/mharj/hetu) [![Maintainability](https://api.codeclimate.com/v1/badges/3dca350166c6d1ea4105/maintainability)](https://codeclimate.com/github/mharj/hetu/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/3dca350166c6d1ea4105/test_coverage)](https://codeclimate.com/github/mharj/hetu/test_coverage)
+# Finnish Person ID check 
+![github action](https://github.com/mharj/hetu/actions/workflows/main.yml/badge.svg)
+[![Maintainability](https://api.codeclimate.com/v1/badges/3dca350166c6d1ea4105/maintainability)](https://codeclimate.com/github/mharj/hetu/maintainability)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/3dca350166c6d1ea4105/test_coverage)](https://codeclimate.com/github/mharj/hetu/test_coverage)
+
+## Usage:
 
 ```javascript
 const {isFemale, isMale, isValidPersonId} = require('fi-pin');