Dont close pool (#74)

* Don't close the pool

This caused failures in prod for us: there are still messages
being sent at this point.

* Add changeset

Author: tmcw

.changeset/light-tigers-design.md

@@ -0,0 +1,5 @@
+---
+"@valtown/deno-http-worker": patch
+---
+
+Don't close the pool (bugfix)

src/DenoHTTPWorker.ts

@@ -337,8 +337,6 @@ class denoHTTPWorker implements DenoHTTPWorker {
       forceKill(this.#process.pid!);
     }
 
-    await this.#pool.close();
-
     fs.rm(this.#socketFile).catch(() => {});
     for (const onexit of this.#onexitListeners) {
       onexit(code ?? 1, signal ?? "");
@@ -354,7 +352,6 @@ class denoHTTPWorker implements DenoHTTPWorker {
     await new Promise<void>((res) => {
       this.#process.on("exit", res);
     });
-    await this.#pool.close();
   }
 
   async websocket(