Merge pull request #51 from Codeception/github-actions

Use GitHub actions and support PHP 8

.github/workflows/main.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: [7.3, 7.4, 8.0]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+
+    - name: Validate composer.json
+      run: composer validate
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-interaction --no-suggest
+
+    - name: Run test suite
+      run: php vendor/bin/phpunit

composer.json

@@ -13,7 +13,7 @@
         }
     ],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3 || ^8.0",
         "ext-dom": "*",
         "phpunit/phpunit": "^9.3"
     },