What about `result.properties` for all geocoder like `nominatim` and `photon`

[Cyrille37]

Hi

As a alternative to #357 it could be easier to add the properties to all geocoders 's result like we can the do what we want with raw result.

ref:

• https://github.com/perliedman/leaflet-control-geocoder/blob/master/src/geocoders/photon.ts#L63
• https://github.com/perliedman/leaflet-control-geocoder/blob/master/src/geocoders/nominatim.ts#L107