chore: adds 8.0 as a tested version

Author: JasonTheAdams

.github/workflows/php-test.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.4', '8.4']
+        php-version: ['7.4', '8.0', '8.4']
 
     steps:
     - uses: actions/checkout@v4