Add badges

README.md

@@ -1,3 +1,8 @@
+[![Latest Stable Version](https://poser.pugx.org/sebastian/cli-parser/v/stable.png)](https://packagist.org/packages/sebastian/cli-parser)
+[![CI Status](https://github.com/sebastianbergmann/cli-parser/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/cli-parser/actions)
+[![Type Coverage](https://shepherd.dev/github/sebastianbergmann/cli-parser/coverage.svg)](https://shepherd.dev/github/sebastianbergmann/cli-parser)
+[![codecov](https://codecov.io/gh/sebastianbergmann/cli-parser/branch/main/graph/badge.svg)](https://codecov.io/gh/sebastianbergmann/cli-parser)
+
 # sebastian/cli-parser
 
 Library for parsing `$_SERVER['argv']`, extracted from `phpunit/phpunit`.