Merge pull request #816 from W0rma/github-actions

Replace Travis with GitHub actions

.github/workflows/ci.yaml

@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  phpunit:
+    name: "PHPUnit"
+    runs-on: "ubuntu-24.04"
+
+    strategy:
+      matrix:
+        php-version:
+          - 5.6
+          - 7.0
+          - 7.1
+          - 7.2
+          - 7.3
+          - 7.4
+          - 8.0
+          - 8.1
+          - 8.2
+          - 8.3
+          - 8.4
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "${{ matrix.php-version }}"
+          coverage: "none"
+          extensions: gd, mbstring
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v3"
+        with:
+          composer-options: "--prefer-dist"
+
+      - name: "Run PHPUnit"
+        run: "vendor/bin/phpunit"