remove php 7.4 from tests

Author: Christoph Singer

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.4, 8.0, 8.1]
+        php: [8.0, 8.1]
         dependency-version: [prefer-lowest, prefer-stable]
 
     steps: