Enable Github Actions - Decom Travis-CI (#1573)

* first draft of GH actions
* Drop old unsupported versions of PHP, Symfony
* Update tests for PhpUnit 9.x
* Apply fixes from StyleCI (#1572)
* Remove Travis-CI config
* Remove GH on cron

.github/workflows/tests.yml

@@ -0,0 +1,39 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        php: [7.3, 7.4, 8.0]
+
+    name: PHP_${{ matrix.php }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Cache dependencies
+        uses: actions/cache@v1
+        with:
+          path: ~/.composer/cache/files
+          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip
+          coverage: none
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-interaction --no-progress
+
+      - name: Execute tests
+        run: vendor/bin/phpunit --verbose

composer.json

@@ -2,13 +2,14 @@
     "name": "laravel/homestead",
     "description": "A virtual machine for web artisans.",
     "require": {
-        "php": "^7.1",
-        "symfony/console": "~3.0||~4.0||~5.0",
-        "symfony/process": "~3.0||~4.0||~5.0",
-        "symfony/yaml": "~3.0||~4.0||~5.0"
+        "php": "^7.3|^8.0",
+        "symfony/console": "~4.0||~5.0",
+        "symfony/process": "~4.0||~5.0",
+        "symfony/yaml": "~4.0||~5.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.0"
+        "phpunit/phpunit": "^9.5",
+        "dms/phpunit-arraysubset-asserts": "^0.2.1"
     },
     "license": "MIT",
     "authors": [