Remove PHP 7.4 from workflow

Author: phpfui

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [8.1, 8.0, 7.4]
+        php: [8.1, 8.0]
         dependency-version: [prefer-stable]
         os: [ubuntu-latest]