Switch CI to Github Actions

.github/workflows/php.yml

@@ -0,0 +1,44 @@
+name: PHP Composer
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  integration:
+    name: PHP ${{ matrix.php-versions }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.4', '8.0', '8.1', '8.2', '8.3']
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: "${{ matrix.php-versions }}"
+        coverage: xdebug
+        ini-values: "memory_limit=-1"
+        tools: phpunit, composer
+
+    - name: Cache Composer packages
+      id: composer-cache
+      uses: actions/cache@v2
+      with:
+        path: vendor
+        key: ${{ runner.os }}-${{ matrix.php-versions }}-php-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-${{ matrix.php-versions }}-php-
+
+    - name: Install dependencies
+      run: composer update --no-progress --no-suggest --ansi
+
+    - name: Run test suite
+      run: |
+        php -v
+        vendor/bin/phpunit -c phpunit.xml.dist