Increase PHPStan Rule Level to 4

sebastianbergmann · sebastianbergmann · commit 4c5a8a20c877 · 2024-12-08T08:35:26.000+01:00
diff --git a/phpstan.neon b/phpstan.neon
@@ -1,5 +1,5 @@
 parameters:
-    level: 3
+    level: 4
     paths:
         - src
         - tests/tests
