perf: ✅ add php deprecation rules

composer.json

@@ -31,6 +31,7 @@
 		"nextcloud/coding-standard": "^1.3.2",
 		"nextcloud/rector": "^0.3.1",
 		"phpstan/phpstan": "~1.12.20",
+		"phpstan/phpstan-deprecation-rules": "~1.2.1",
 		"rector/rector": "~1.2.10"
 	},
 	"config": {

phpstan.neon

@@ -2,5 +2,5 @@ parameters:
     level: 9
     paths:
         - lib
-    ignoreErrors:
+includes:
-        - '#Method [a-zA-Z0-9:\(\)\\_]+ return type with generic class OCP\\AppFramework\\Http\\[a-zA-Z]+ does not specify its types#'
+    - vendor/phpstan/phpstan-deprecation-rules/rules.neon