Adds automated test using build matrix (#3)

.github/workflows/tests.yml

@@ -0,0 +1,47 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [7.2, 7.4]
+        laravel: [^6.0, ^7.0, ^8.0]
+        exclude:
+          # Exclude laravel 8 on php 7.2 as it requires php 7.3+
+          - php: 7.2
+            laravel: ^8.0
+
+    name: Run Test (P${{ matrix.php }} - L${{ matrix.laravel }})
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip, fileinfo
+          tools: composer:v2
+          coverage: none
+
+      - name: Install dependencies
+        run: |
+           composer require "illuminate/database=${{ matrix.laravel }}" --no-update
+           composer update --prefer-dist --no-interaction --no-progress
+      - name: Execute tests
+        run: vendor/bin/phpunit --verbose
+
+      - name: Upload artifacts (on failure)
+        uses: actions/upload-artifact@master
+        if: failure()
+        with:
+          name: Logs
+          path: ./storage/logs