add 7.4 back for tests

Author: kylekz

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
         strategy:
             fail-fast: true
             matrix:
-                php: [ 8.0, 8.1 ]
+                php: [ 7.4, 8.0, 8.1 ]
                 dependency-version: [prefer-stable]
 
         name: PHP ${{ matrix.php }} - ${{ matrix.dependency-version }}