fix: add dynamic npm imports

Author: kitsonk

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@oak/acorn",
-  "version": "0.7.0-alpha.3",
+  "version": "0.7.0-alpha.4",
   "exports": {
     ".": "./mod.ts",
     "./context": "./context.ts",

http_server_node.ts

@@ -158,6 +158,11 @@ export default class HttpServer implements Server {
 
   async listen(): Promise<Listener> {
     if (!("Request" in globalThis) || !("Response" in globalThis)) {
+      // adding this dependencies because for some reason they are picked up
+      // in undici directly when deploying on CFW, even though they aren't
+      // actually used at runtime
+      await import("npm:buffer@^6.0");
+      await import("npm:string_decoder@^1.3");
       const { Request, Response } = await import("npm:undici@^6.18");
       Object.defineProperties(globalThis, {
         "Request": {