GeocoderStatus missing

My Code under test compares a geocoding result to enum members of `google.maps.GeocoderStatus`. It's missing from the mock object. I'd like to fix it upstream and not only locally.

**Describe the solution you'd like**
add it to src/maps/maps/constants.ts

**Describe alternatives you've considered**
Re-export enum taken from some other google repo

**Additional context**
Add any other context or screenshots about the feature request here.