Added Action for composer with token to avoid errors when running tests

This is not relates to this issue but required because tests won't pass
without this.

.github/workflows/tests.yml

@@ -9,9 +9,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Add composer
+        uses: php-actions/composer@v6
+        env:
+          COMPOSER_AUTH: '{"github-oauth": {"github.com": "${{ secrets.PAT }}"} }'
+
+
       - name: Add HTTP basic auth credentials
         run: |
           echo "auth.json path: $GITHUB_WORKSPACE/auth.json"