Added GHA workflow for tests.

Removed Travis configuration.

.github/workflows/Test.yaml

@@ -0,0 +1,48 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+  schedule:
+    - cron: 0 6 * * *
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - 8.1
+          - 8.2
+          - 8.3
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP ${{ matrix.php }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: xdebug
+
+      - name: Validate composer.json
+        run: composer validate
+
+      - name: Cache dependencies
+        id: composer-cache
+        uses: actions/cache@v4
+        with:
+          path: vendor
+          key: php-${{ matrix.php }}
+
+      - name: Install dependencies
+        run: composer update --no-interaction --no-progress
+
+      - name: Run test suite with coverage
+        run: composer test -- --coverage-clover=build/logs/clover.xml
+
+      - name: Upload test coverage
+        run: bash <(curl -s https://codecov.io/bash)

.gitignore

@@ -1,3 +1,4 @@
 /.*/
+!/.github/
 /vendor/
 /composer.lock