Update test.yaml

Author: LasseRafn

.github/workflows/test.yaml

@@ -13,7 +13,7 @@ jobs:
       cancel-in-progress: true
     strategy:
       matrix:
-        php-versions: ['8.0']
+        php-versions: ['7.4']
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2