Use envelop-native API for adding validation rule

Author: benjie

src/envelop.ts

@@ -1,16 +1,13 @@
 import type { Plugin } from "@envelop/core";
-import { specifiedRules } from "graphql";
 
 import { depthLimit } from "./index.js";
 import type { Options } from "./interfaces.js";
 
 export function useDepthLimit(options: Options): Plugin {
   const rule = depthLimit(options);
   return {
-    onValidate({ params }) {
-      params.rules = params.rules
-        ? [...params.rules, rule]
-        : [...specifiedRules, rule];
+    onValidate({ addValidationRule }) {
+      addValidationRule(rule);
     },
   };
 }