Update README.md

Author: peppelinux

README.md

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 # cryptojwt
 
+![License](https://img.shields.io/badge/license-Apache%202-blue.svg)
+![Python version](https://img.shields.io/badge/python-3.6%20%7C%203.7-blue.svg)
+
 An implementation of the JSON cryptographic specs JWS, JWE, JWK, and JWA [RFC 7515-7518] and JSON Web Token (JWT) [RFC 7519]
 
 oidcmsg is the 1st layer in the