Update shields in README.md

Author: Ganeshwara Hananda

README.md

@@ -1,7 +1,8 @@
 # Grakn Client for Python
 
-[![CircleCI](https://circleci.com/gh/graknlabs/client-python/tree/master.svg?style=shield)](https://circleci.com/gh/graknlabs/client-python/tree/master)
-[![Slack Status](http://grakn-slackin.herokuapp.com/badge.svg)](https://grakn.ai/slack)
+[![Grabl](https://grabl.io/api/status/graknlabs/client-python/badge.svg)](https://grabl.io/graknlabs/grakn)
+[![GitHub release](https://img.shields.io/github/release/graknlabs/client-python.svg)](https://github.com/graknlabs/grakn/releases/latest)
+[![Discord](https://img.shields.io/discord/665254494820368395?color=7389D8&label=chat&logo=discord&logoColor=ffffff)](https://grakn.ai/discord)
 [![Discussion Forum](https://img.shields.io/discourse/https/discuss.grakn.ai/topics.svg)](https://discuss.grakn.ai)
 [![Stack Overflow](https://img.shields.io/badge/stackoverflow-grakn-796de3.svg)](https://stackoverflow.com/questions/tagged/grakn)
 [![Stack Overflow](https://img.shields.io/badge/stackoverflow-graql-3dce8c.svg)](https://stackoverflow.com/questions/tagged/graql)