Move to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: [7.4, 7.3, 7.2]
+        release: [stable, lowest]
+        include: 
+          - php: 7.4
+            release: stable 
+            coverage: xdebug
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/cache@v1
+        with:
+          path: ~/.composer/cache/files
+          key: php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}
+      - uses: shivammathur/setup-php@v1
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: bcmath, ctype, json, mbstring, openssl, pdo, pdo_sqlite, tokenizer, xml
+          coverage: ${{ matrix.coverage }}
+      - run: composer update --no-interaction --no-progress --no-suggest --prefer-dist --prefer-${{ matrix.release }}
+      - run: |
+          PHPUNIT_FLAGS=$([ "${{ matrix.coverage }}" == "xdebug" ] && echo "--coverage-clover=coverage.xml" || echo "")
+          vendor/bin/phpunit $PHPUNIT_FLAGS
+      - run: |
+          wget -q https://scrutinizer-ci.com/ocular.phar
+          php ocular.phar code-coverage:upload --format=php-clover coverage.xml
+        if: matrix.coverage == 'xdebug'