Added phpunit github actions workflow

Author: jbtronics

.github/workflows/phpunit.yml

@@ -0,0 +1,39 @@
+name: PHPUnit Tests
+
+on:
+    push:
+    pull_request:
+
+jobs:
+    tests:
+        runs-on: ubuntu-latest
+
+        strategy:
+            fail-fast: false
+            matrix:
+                php-version: [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: Setup PHP
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php-version }}
+                  coverage: none
+                  tools: composer
+
+            - name: Cache Composer dependencies
+              uses: actions/cache@v4
+              with:
+                  path: ~/.composer/cache
+                  key: composer-${{ matrix.php-version }}-${{ hashFiles('**/composer.lock') }}
+                  restore-keys: |
+                      composer-${{ matrix.php-version }}-
+
+            - name: Install dependencies
+              run: composer update --no-interaction --prefer-dist
+
+            - name: Run tests
+              run: composer test