Setup GitHub Actions

Author: josiasmontag

.github/workflows/run-tests.yml

@@ -0,0 +1,42 @@
+name: Tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ["8.0", "7.4", "7.3", "7.2"]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.composer/cache/files
+          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+          restore-keys: |
+            dependencies-php-${{ matrix.php }}-composer-
+            dependencies-php-
+            
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: json, dom, curl, libxml, mbstring
+          coverage: none
+
+      - name: Install dependencies
+        run: composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-suggest
+
+      - name: Execute tests
+        run: vendor/bin/phpunit