chore: drop fetch polyfill as we require Node.js 18

package.json

@@ -50,7 +50,7 @@
   "engines": {
     "node": "^18.18.0 || ^20.8.0"
   },
-  "packageManager": "pnpm@8.7.1",
+  "packageManager": "pnpm@8.9.2",
   "funding": [
     {
       "type": "github",

packages/adapter-dgraph/package.json

@@ -47,8 +47,7 @@
     "@types/jsonwebtoken": "^8.5.5",
     "jest": "^27.4.3",
     "ts-jest": "^27.0.3",
-    "typescript": "5.2.2",
-    "undici": "5.22.1"
+    "typescript": "5.2.2"
   },
   "dependencies": {
     "@auth/core": "workspace:*",
@@ -57,4 +56,4 @@
   "jest": {
     "preset": "@auth/adapter-test/jest"
   }
-}
+}

packages/adapter-dgraph/tests/index.test.ts

@@ -7,8 +7,6 @@ import path from "path"
 
 import type { DgraphClientParams } from "../src"
 
-globalThis.fetch ??= require("undici").fetch
-
 const params: DgraphClientParams = {
   endpoint: "http://localhost:8080/graphql",
   authToken: "test",