replace travis with github actions

Author: JanTvrdik

.github/workflows/qa.yaml

@@ -0,0 +1,32 @@
+name: QA
+
+on:
+  pull_request:
+    branches:
+      - master
+
+  push:
+    branches:
+      - master
+      - v*
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ['7.1', '7.2', '7.3', '7.4', '8.0']
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: json
+          coverage: none
+
+      - run: composer install --no-interaction --no-progress
+      - run: vendor/bin/tester -C tests/cases

.travis.yml

@@ -1,7 +1,7 @@
 Nextras Secured Links
 =====================
 
-[![Build Status](https://travis-ci.org/nextras/secured-links.svg?branch=master)](https://travis-ci.org/nextras/secured-links)
+[![Build Status](https://github.com/nextras/secured-links/workflows/QA/badge.svg?branch=master)](https://github.com/nextras/secured-links/actions?query=workflow%3AQA+branch%3Amaster)
 [![Downloads this Month](https://img.shields.io/packagist/dm/nextras/secured-links.svg?style=flat)](https://packagist.org/packages/nextras/secured-links)
 [![Stable Version](https://img.shields.io/packagist/v/nextras/secured-links.svg?style=flat)](https://packagist.org/packages/nextras/secured-links)