Add Codecov badge

README.md

@@ -5,7 +5,7 @@ Ansible Runner
 [![Documentation](https://readthedocs.org/projects/ansible-runner/badge/?version=stable)](https://ansible-runner.readthedocs.io/en/latest/)
 [![Code of Conduct](https://img.shields.io/badge/Code%20of%20Conduct-Ansible-silver.svg)](https://docs.ansible.com/ansible/latest/community/code_of_conduct.html)
 [![Ansible Mailing lists](https://img.shields.io/badge/Mailing%20lists-Ansible-orange.svg)](https://docs.ansible.com/ansible/latest/community/communication.html#mailing-list-information)
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+[![codecov](https://codecov.io/gh/ansible/ansible-runner/branch/devel/graph/badge.svg?token=CmCcjBz0pQ)](https://codecov.io/gh/ansible/ansible-runner)
 
 Ansible Runner is a tool and Python library that helps when interfacing with Ansible directly or as part of another system. Ansible Runner works as a standalone tool, a container image interface, or a Python module that can be imported. The goal is to provide a stable and consistent interface abstraction to Ansible.