Migrate Travis CI to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: PHP
+
+on: [push, pull_request]
+
+jobs:
+  run:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest]
+        php-versions: ['7.1', '7.2', '7.3', '7.4']
+    name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: mbstring, pdo, pdo_mysql, intl, zip
+          coverage: none
+
+      - name: Install dependencies
+        run: composer install
+
+      - name: Execute PHPUnit tests
+        run: XDEBUG_MODE=coverage vendor/bin/phpunit --coverage-clover=coverage.xml
+
+      - name: Run test suite
+        run: composer stan

composer.json

@@ -14,9 +14,9 @@
     "require-dev": {
         "phpunit/phpunit": "^7.1",
         "phpmd/phpmd": "dev-master",
-        "squizlabs/php_codesniffer": "^3.0@dev",
-        "friendsofphp/php-cs-fixer": "^2.14@dev",
-        "phpstan/phpstan": "^0.11.0@dev"
+        "squizlabs/php_codesniffer": "^3.0",
+        "friendsofphp/php-cs-fixer": "^2.14",
+        "phpstan/phpstan": "^0.11.0"
     },
     "autoload": {
         "psr-4": {
@@ -36,6 +36,7 @@
         }
     ],
     "minimum-stability": "dev",
+    "prefer-stable": true,
     "scripts": {
         "cs-fixer": "php-cs-fixer fix --rules=@PSR2 src",
         "stan": "vendor/bin/phpstan analyse src --level=7"