Exposed function deadlocks if called too early

## Problem description

Wrapped function does not return when called before the worker is ready.

## Minimum codes to reproduce

### Deps.

- comlink 4.4.1
- esbuild 0.23.0 for bundling

```ts
// task.ts: Dummy task
// task.ts

// Dummy task
export async function dummyTask(time: number) {
return new Promise((resolve) => {
setTimeout(resolve, time);
});
}
```

```ts
// worker.ts
import * as Comlink from "comlink";
import { dummyTask } from "./task.js";

// Wait for 500 ms
// Modeling long-running tasks (ex. WASM compilation)
await dummyTask(500);

Comlink.expose({
dummy: () => {
return 42;
},
});
```

```ts
// index.ts
import * as Comlink from "comlink";
import { dummyTask } from "./task.js";

const url = new URL("./worker.js", import.meta.url);

const wrapper: Comlink.Remote<{
dummy: () => number;
}> = Comlink.wrap(new Worker(url, { type: "module" }));

// Works without problem with this line
// await dummyTask(1000);

// Never returns
const x = await wrapper.dummy();

// Unreachable
console.log(x);
```