useWallets did not return the expected on Server Render

`useWallets` did not return the expected on `Server Render`. 
`stateKey` is missing.

```
const wallets = useWallets();
```
```
// output
{
    "wallets": [],
    "walletModules": [],
    "chains": [],
    ...
}
```
https://github.com/blocknative/web3-onboard/blob/2c8647c28426a7086c1988a1b32c2aa4cd6d5d52/packages/react/src/hooks/useAppState.ts#L31