Error Creating New Wallet
I'm encountering an error when trying to create a new wallet using 'monero-javascript'.

Error message:
```javascript
TypeError [Error]: fetch failed
    at Object.fetch (node:internal/deps/undici/undici:11457:11) {
  cause: Error: unknown scheme
      at makeNetworkError (node:internal/deps/undici/undici:6802:35)
      at schemeFetch (node:internal/deps/undici/undici:10919:18)
      at node:internal/deps/undici/undici:10792:26
      at mainFetch (node:internal/deps/undici/undici:10809:11)
      at fetching (node:internal/deps/undici/undici:10766:7)
      at fetch2 (node:internal/deps/undici/undici:10644:20)
      at Object.fetch (node:internal/deps/undici/undici:11455:18)
      at fetch (node:internal/process/pre_execution:230:25)
      at instantiateAsync (C:\Users\Sunkwi\Desktop\MoneroTest\node_modules\monero-javascript\dist\monero_wallet_full.js:9:14390)
```

Code:
```typescript
import * as monerojs from 'monero-javascript';

(async () => {
  try {
    const walletFull = await monerojs.createWalletFull({
      password: '0123456789',
      networkType: 'stagenet',
      serverUri: 'http://127.0.0.1:38084',
      serverUsername: 'rpc_user',
      serverPassword: 'abc123',
    });

    console.log(walletFull);
  } catch (error) {
    console.log(error);
  }
})();
```

I am starting my RPC server with the following command:
`./monero-wallet-rpc --daemon-address http://localhost:38081 --stagenet --rpc-bind-port 38084 --rpc-login rpc_user:abc123 --wallet-dir ./`

Do you know where the problem might be coming from?
