update

README.md

@@ -7,6 +7,7 @@
 [![Lifecycle:experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://www.tidyverse.org/lifecycle/#experimental)
 ![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)
 [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active)
+[![DOI](https://zenodo.org/badge/466339915.svg)](https://zenodo.org/badge/latestdoi/466339915)
 <a href="https://ko-fi.com/ambarja" Title="Support"><img src="https://img.shields.io/badge/Buy_me_coffee-%E2%9D%A4%C2%A0-ff9900.svg?style=for-the-badge/">
 
 <!-- badges: end -->