Update tests.yml with the Flux Pro config (#51)

* Update tests.yml

* Remove final empty line

Author: morpheus7CS

.github/workflows/tests.yml

@@ -35,6 +35,9 @@ jobs:
       - name: Install Node Dependencies
         run: npm i
 
+      - name: Add Flux Credentials Loaded From ENV
+        run: composer config http-basic.composer.fluxui.dev "${{ secrets.FLUX_USERNAME }}" "${{ secrets.FLUX_LICENSE_KEY }}"
+
       - name: Install Dependencies
         run: composer install --no-interaction --prefer-dist --optimize-autoloader