Replace Travis CI with GitHub Actions (#599)

.github/workflows/tests.yml

@@ -0,0 +1,36 @@
+name: Tests
+
+on: [ push, pull_request ]
+
+jobs:
+  test:
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+        php: [ "8.0", "7.4", "7.3", "7.2" ]
+
+    name: PHP ${{ matrix.php }} - ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.composer/cache/files
+          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: none
+
+      - name: Install dependencies
+        run: composer update --prefer-stable --prefer-dist --no-interaction --no-suggest
+
+      - name: Execute tests
+        run: vendor/bin/phpunit

composer.json

@@ -18,18 +18,19 @@
   "require": {
     "php": "^7.2|^8.0",
     "anahkiasen/html-object": "~1.4",
-    "illuminate/config": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/container": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/http": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/routing": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/session": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/translation": "~5.0|^6.0|^7.0|^8.0",
-    "illuminate/support": "~5.0|^6.0|^7.0|^8.0"
+    "illuminate/config": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/container": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/contracts": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/http": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/routing": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/session": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/translation": "^5.1.3|^6.0|^7.0|^8.0",
+    "illuminate/support": "^5.1.3|^6.0|^7.0|^8.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^8.5",
     "mockery/mockery": "^1.3",
-    "illuminate/database": "~5.0|^6.0|^7.0|^8.0"
+    "illuminate/database": "^5.1.3|^6.0|^7.0|^8.0"
   },
   "autoload": {
     "psr-4": {