Replace travis.ci badge with an Actions one

Author: afollestad

README.md

@@ -2,7 +2,7 @@
 
 #### [View Releases and Changelogs](https://github.com/afollestad/material-dialogs/releases)
 
-[![Build Status](https://travis-ci.org/afollestad/material-dialogs.svg)](https://travis-ci.org/afollestad/material-dialogs)
+[![Android CI](https://github.com/afollestad/material-dialogs/workflows/Android%20CI/badge.svg)](https://github.com/afollestad/material-dialogs/actions?query=workflow%3A%22Android+CI%22)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/0a4acc30a9ce440087f7688735359bb8)](https://www.codacy.com/app/drummeraidan_50/material-dialogs?utm_source=github.com&utm_medium=referral&utm_content=afollestad/material-dialogs&utm_campaign=Badge_Grade)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)