Add tests to CI

Author: alies-dev

.github/workflows/test.yml

@@ -0,0 +1,51 @@
+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+name: "Tests"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "main"
+
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+
+  tests:
+    name: "Tests"
+
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        dependencies:
+          - "lowest"
+          - "highest"
+        php-version:
+          - "8.1"
+          - "8.2"
+          - "8.3"
+        operating-system:
+          - "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v3"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+          extensions: mbstring
+
+      - name: "Install dependencies"
+        uses: "ramsey/composer-install@v2"
+        with:
+          dependency-versions: "${{ matrix.dependencies }}"
+
+      - name: "Tests"
+        run: "composer test"