Wait for WebSocket state before send data

```
Uncaught (in promise) DOMException: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.
at https://127.0.0.1:8001/metacom.js:56:21
    at new Promise (<anonymous>)
    at Object.signIn (https://127.0.0.1:8001/metacom.js:53:14)
    at signIn (https://127.0.0.1:8001/console.js:251:15)
```