Adding minor badges

Author: micahcarroll

README.md

@@ -1,4 +1,4 @@
-![MDP python tests](https://github.com/HumanCompatibleAI/overcooked_ai/workflows/.github/workflows/pythontests.yml/badge.svg) ![overcooked-ai codecov](https://codecov.io/gh/HumanCompatibleAI/overcooked_ai/branch/master/graph/badge.svg)
+![MDP python tests](https://github.com/HumanCompatibleAI/overcooked_ai/workflows/.github/workflows/pythontests.yml/badge.svg) ![overcooked-ai codecov](https://codecov.io/gh/HumanCompatibleAI/overcooked_ai/branch/master/graph/badge.svg) [![PyPI version](https://badge.fury.io/py/overcooked-ai.svg)](https://badge.fury.io/py/overcooked-ai) [!["Open Issues"](https://img.shields.io/github/issues-raw/HumanCompatibleAI/overcooked_ai.svg)](https://github.com/HumanCompatibleAI/minerl/overcooked_ai) [![GitHub issues by-label](https://img.shields.io/github/issues-raw/HumanCompatibleAI/overcooked_ai/bug.svg?color=red)](https://github.com/HumanCompatibleAI/overcooked_ai/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+label%3Abug) [![Downloads](https://pepy.tech/badge/overcooked-ai)](https://pepy.tech/project/overcooked-ai)
 
 # Overcooked-AI