jamiel rahi

Fix: handle error if getNextUrl throws

1

## Problem If getNextUrl throws an error, the websocket will never be able to reconnect again. For example: ``` async () => { const token = await getToken() return baseUrl...

### Describe the bug Before v6, the `branch.subscribe` callback would run on App mount _and_ on app foreground. It's critical for the callback to run on foreground, because users will...