removed travis-ci and added github actions build status to readme (#319)

Signed-off-by: fenn-cs <[email protected]>

Author: nfebe

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 jobs:
   main:
     name: phpList on PHP ${{ matrix.php-versions }} [Build, Test]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     env:
       DB_DATABASE: phplist
       DB_USERNAME: root

.travis.yml

@@ -1,6 +1,7 @@
 # phpList core module
 
-[![Build Status](https://travis-ci.com/phpList/core.svg?branch=master)](https://travis-ci.com/phpList/core)
+
+[![Build Status](https://github.com/phpList/core/workflows/phpList%20Build/badge.svg)](https://github.com/phpList/web-frontend/actions)
 [![Latest Stable Version](https://poser.pugx.org/phplist/core/v/stable.svg)](https://packagist.org/packages/phpList/core)
 [![Total Downloads](https://poser.pugx.org/phplist/core/downloads.svg)](https://packagist.org/packages/phpList/core)
 [![Latest Unstable Version](https://poser.pugx.org/phplist/core/v/unstable.svg)](https://packagist.org/packages/phpList/core)