use codecov?

.github/workflows/codecov.yml

@@ -0,0 +1,4 @@
+- name: Upload coverage reports to Codecov
+  uses: codecov/[email protected]
+  with:
+    token: ${{ secrets.CODECOV_TOKEN }}

readme.md

@@ -1,7 +1,10 @@
+# PyFlyt - UAV Flight Simulator for Reinforcement Learning Research
+
+![PyPI - Version](https://img.shields.io/pypi/v/PyFlyt)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![total downloads](https://static.pepy.tech/personalized-badge/pyflyt?period=total&units=international_system&left_color=grey&right_color=green&left_text=total%20downloads)](https://pepy.tech/project/pyflyt)
 [![weekly downloads](https://static.pepy.tech/personalized-badge/pyflyt?period=week&units=international_system&left_color=grey&right_color=green&left_text=weekly%20downloads)](https://pepy.tech/project/pyflyt)
 
-# PyFlyt - UAV Flight Simulator for Reinforcement Learning Research
 
 Comes with Gymnasium and PettingZoo environments built in!