When there are no data.rows.dimensions array in the response I get UnhandledPromiseRejectionWarning

In cases when raw response is missing data.rows.dimensions array the library errors out with:

```
UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'map' of undefined
```
...and that error cannot be caught with Promise.catch.

  