SUPPORT-87332 - added GitHub workflow

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on: push
+
+permissions:
+    contents: read
+
+jobs:
+    phpunit:
+        name: Run tests on ${{ matrix.php-version }} with ${{ matrix.dependency-versions }} dependencies
+        runs-on: ubuntu-latest
+        strategy:
+            max-parallel: 1
+            matrix:
+                php-version:
+                    - '7.1'
+                    - '7.2'
+                dependency-versions:
+                    - 'lowest'
+                    - 'highest'
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v3
+
+            - name: Setup PHP
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: ${{ matrix.php-version }}
+
+            - name: Install dependencies
+              uses: ramsey/composer-install@v2
+              with:
+                  dependency-versions: ${{ matrix.dependency-versions }}
+
+            - name: Run tests
+              run: composer test
+