Fix badges links.

Author: Damien Debin

README.md

@@ -1,7 +1,7 @@
-![Travis (.org)](https://img.shields.io/travis/ddebin/atom-generator?logo=travis&style=for-the-badge)
-![Codecov](https://img.shields.io/codecov/c/github/ddebin/atom-generator?logo=codecov&style=for-the-badge)
+[![Travis (.org)](https://img.shields.io/travis/ddebin/atom-generator?logo=travis&style=for-the-badge)](https://travis-ci.org/ddebin/atom-generator)
+[![Codecov](https://img.shields.io/codecov/c/github/ddebin/atom-generator?logo=codecov&style=for-the-badge)](https://codecov.io/gh/ddebin/atom-generator)
 ![PHP from Packagist](https://img.shields.io/packagist/php-v/ddebin/atom-generator?logo=php&style=for-the-badge)
-![Packagist Version](https://img.shields.io/packagist/v/ddebin/atom-generator?style=for-the-badge)
+[![Packagist Version](https://img.shields.io/packagist/v/ddebin/atom-generator?style=for-the-badge)](https://packagist.org/packages/ddebin/atom-generator)
 ![Packagist](https://img.shields.io/packagist/l/ddebin/atom-generator?style=for-the-badge)
 
 # Atom feed generator