Emulate Geolocation

**Is your feature request related to a problem? Please describe.**
It'd be great to have the ability to emulate the geo location, e.g.: 

```
Why does the map not show our store in Munich when the current location is set to : 48°8'14.75"N, 11°34'31.76"E?
```

**Describe the solution you'd like**
Puppeteer already supports it via: https://pptr.dev/api/puppeteer.page.setgeolocation

