feat: add next 16 support (#13303)

Author: dulmandakh

packages/next-auth/package.json

@@ -100,7 +100,7 @@
   },
   "peerDependencies": {
     "@auth/core": "0.34.2",
-    "next": "^12.2.5 || ^13 || ^14 || ^15",
+    "next": "^12.2.5 || ^13 || ^14 || ^15 || ^16",
     "nodemailer": "^7.0.7",
     "react": "^17.0.2 || ^18 || ^19",
     "react-dom": "^17.0.2 || ^18 || ^19"