update coverage badge to codecov

README.md

@@ -4,7 +4,7 @@
 # Goodman Focus Finder
 
 ![Goodman Focus](https://github.com/soar-telescope/goodman_focus/workflows/Goodman%20Focus/badge.svg)
-[![Coverage Status](https://coveralls.io/repos/github/soar-telescope/goodman_focus/badge.svg?branch=master)](https://coveralls.io/github/soar-telescope/goodman_focus?branch=master)
+[![codecov](https://codecov.io/gh/soar-telescope/goodman_focus/graph/badge.svg?token=2ZK2DAMMYE)](https://codecov.io/gh/soar-telescope/goodman_focus)
 [![Documentation Status](https://readthedocs.org/projects/goodman-focus/badge/?version=latest)](https://goodman-focus.readthedocs.io/en/latest/?badge=latest)
 [![pypi](https://img.shields.io/pypi/v/goodman_focus.svg?style=flat)](https://pypi.org/project/goodman-focus/)
 
@@ -17,4 +17,4 @@ All the documentation is maintained in https://soardocs.readthedocs.io/projects/
 # Found a problem?
 
 Please [Open an Issue](https://github.com/soar-telescope/goodman_focus/issues) on
-GitHub.
+GitHub.