Merge pull request #51 from Jurj-Bogdan/issue-50

added codecov badge

Author: arhimede

README.md

@@ -12,6 +12,7 @@ DotKernel mail component based on [laminas-mail](https://github.com/laminas/lami
 [![GitHub license](https://img.shields.io/github/license/dotkernel/dot-mail)](https://github.com/dotkernel/dot-mail/blob/4.0/LICENSE.md)
 
 [![Build Static](https://github.com/dotkernel/dot-mail/actions/workflows/static-analysis.yml/badge.svg?branch=4.0)](https://github.com/dotkernel/dot-mail/actions/workflows/static-analysis.yml)
+[![codecov](https://codecov.io/gh/dotkernel/dot-mail/branch/4.0/graph/badge.svg?token=G51NEHYKD3)](https://codecov.io/gh/dotkernel/dot-mail)
 
 [![SymfonyInsight](https://insight.symfony.com/projects/1995ea7c-3b34-4eee-ac48-3571860d0307/big.svg)](https://insight.symfony.com/projects/1995ea7c-3b34-4eee-ac48-3571860d0307)