Bump undici to 5.22.1

Author: mrbbot

package-lock.json

@@ -35,10 +35,9 @@
     "glob-to-regexp": "^0.4.1",
     "http-cache-semantics": "^4.1.0",
     "kleur": "^4.1.5",
-    "set-cookie-parser": "^2.6.0",
     "source-map-support": "0.5.21",
     "stoppable": "^1.1.0",
-    "undici": "^5.13.0",
+    "undici": "^5.22.1",
     "workerd": "1.20230814.1",
     "ws": "^8.11.0",
     "youch": "^3.2.2",

packages/miniflare/package.json

@@ -14,7 +14,6 @@ import type {
   RequestInitCfProperties,
 } from "@cloudflare/workers-types/experimental";
 import exitHook from "exit-hook";
-import { splitCookiesString } from "set-cookie-parser";
 import stoppable from "stoppable";
 import { WebSocketServer } from "ws";
 import { z } from "zod";
@@ -372,7 +371,7 @@ async function writeResponse(response: Response, res: http.ServerResponse) {
     const key = entry[0].toLowerCase();
     const value = entry[1];
     if (key === "set-cookie") {
-      headers[key] = splitCookiesString(value);
+      headers[key] = response.headers.getSetCookie();
     } else {
       headers[key] = value;
     }