Take @hono/node-server to 2.1.1

All three entry points we import survive the major unchanged: `serve`
keeps its `(options, listeningListener)` signature and still accepts
`fetch`, `hostname` and `port`; `RESPONSE_ALREADY_SENT` is still exported
from `utils/response`; `getConnInfo` is still on `conninfo`. The peer is
hono ^4 and the engine >=20, both of which we already meet.

What v2 adds is two defaults worth knowing about. `overrideGlobalObjects`
swaps in a lighter Request/Response, and `autoCleanupIncoming` destroys
an incoming request the app never finished reading -- which is the
behaviour you want behind a proxy, and is on by default.

Neither is something the unit tests would notice, so this was run rather
than reasoned about. Against the mock: login, an /api/events stream, and
a POST carrying a body through to upstream. The SSE path is the one that
matters, since it writes to the raw ServerResponse and hands back
RESPONSE_ALREADY_SENT; it answers with the same headers, the same
chunked encoding and the same bytes as 1.19.17 does on the same script.

package-lock.json

@@ -592,12 +592,12 @@
       }
     },
     "node_modules/@hono/node-server": {
-      "version": "1.19.17",
+      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/@hono/node-server/-/node-server-1.19.17.tgz",
+      "resolved": "https://registry.npmjs.org/@hono/node-server/-/node-server-2.1.1.tgz",
-      "integrity": "sha512-dSneS5qhiauZWGDCeK4o695Xd9nUNjviSZCMQrj10eetr8Uln1ucn6bbphOM6UynAMMtNIzZNSpL9vnASJwrPQ==",
+      "integrity": "sha512-ELuehkj5VCBdgEw9zs+ivkKwyzzUCSQuE96YmiPvn1ECBoZCczbFXJLeEGMTYjphP6gydh4pHMqEYPVMYUVgQg==",
       "license": "MIT",
       "engines": {
-        "node": ">=18.14.1"
+        "node": ">=20"
       },
       "peerDependencies": {
         "hono": "^4"
@@ -3182,7 +3182,7 @@
       "version": "2.16.0",
       "license": "AGPL-3.0-or-later",
       "dependencies": {
-        "@hono/node-server": "^1.13.8",
+        "@hono/node-server": "^2.1.1",
         "hono": "^4.13.7"
       },
       "devDependencies": {

server/package.json

@@ -16,7 +16,7 @@
     "mock:no-keyword-sort": "MOCK_NO_KEYWORD_SORT=1 tsx src/mock/index.ts"
   },
   "dependencies": {
-    "@hono/node-server": "^1.13.8",
+    "@hono/node-server": "^2.1.1",
     "hono": "^4.13.7"
   },
   "devDependencies": {