Update badges

README.md

@@ -1,8 +1,9 @@
-# sebastian/environment
-
-[![Latest Stable Version](https://img.shields.io/packagist/v/sebastian/environment.svg?style=flat-square)](https://packagist.org/packages/sebastian/environment)
+[![Latest Stable Version](https://poser.pugx.org/sebastian/environment/v/stable.png)](https://packagist.org/packages/sebastian/environment)
 [![CI Status](https://github.com/sebastianbergmann/environment/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/environment/actions)
 [![Type Coverage](https://shepherd.dev/github/sebastianbergmann/environment/coverage.svg)](https://shepherd.dev/github/sebastianbergmann/environment)
+[![codecov](https://codecov.io/gh/sebastianbergmann/environment/branch/main/graph/badge.svg)](https://codecov.io/gh/sebastianbergmann/environment)
+
+# sebastian/environment
 
 This component provides functionality that helps writing PHP code that has runtime-specific (PHP / HHVM) execution paths.