Add the crates io status badge

Author: tmthecoder

README.md

@@ -1,5 +1,6 @@
 ## xotp
 
+[![crate](https://img.shields.io/crates/v/xotp.svg)](https://crates.io/crates/xotp)
 [![xotp](https://github.com/tmthecoder/xotp/actions/workflows/xotp.yml/badge.svg)](https://github.com/tmthecoder/xotp/actions/workflows/xotp.yml)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)