CI: add code coverage (#409)

Signed-off-by: MarcoIeni <11428655+MarcoIeni@users.noreply.github.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index d7775aff..db56380f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 [![Build Status](https://travis-ci.com/dandavison/delta.svg?branch=master)](https://travis-ci.com/dandavison/delta)
 [![Gitter](https://badges.gitter.im/dandavison-delta/community.svg)](https://gitter.im/dandavison-delta/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 [![CI](https://github.com/dandavison/delta/workflows/Continuous%20Integration/badge.svg)](https://github.com/dandavison/delta/actions)
+[![Coverage Status](https://coveralls.io/repos/github/dandavison/delta/badge.svg?branch=master)](https://coveralls.io/github/dandavison/delta?branch=master)
 
 ## A viewer for git and diff output