Nicer logs when waiting for a tx to mine, etc.

Currently we print something like:
```
Doing x...
 Did x
```

We can have something nicer like:

[sindresorhus/ora](https://github.com/sindresorhus/ora)

![](https://raw.githubusercontent.com/sindresorhus/ora/master/screenshot.svg?sanitize=true)