ci: migrate to github actions

Author: ecastro98

.github/workflows/php.yml

@@ -0,0 +1,27 @@
+name: PHP Composer
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.1', '7.2', '7.3', '7.4']
+    name: Build PHP version ${{ matrix.php-versions }}
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest
+
+    - name: Run test suite
+      run: composer test