test: test github output branch

Author: Greg Bowler

.github/workflows/ci.yml

@@ -7,12 +7,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: php-actions/composer@v5
+      - uses: php-actions/composer@v6
 
       - name: PHPUnit Tests
-        uses: php-actions/phpunit@v2
+        uses: php-actions/phpunit@github-output
         env:
           TEST_NAME: Scarlett
         with: