Align OpenStreetMapProvider's RawResult with Nominatim API

[yurloc]

See https://nominatim.org/release-docs/develop/api/Search/. The API uses the less common form "licence".

When using leaflet-geosearch with TypeScript, accessing result.raw.licence causes a compilation error and needs to be worked around by using // @ts-ignore.

Using result.raw.license obviously contains no data.

Click to expand a response example:

```json { "address": { "bakery": "B\u00e4cker Kamps", "city_district": "Mitte", "continent": "European Union", "country": "Deutschland", "country_code": "de", "footway": "Bahnsteig U6", "neighbourhood": "Sprengelkiez", "postcode": "13353", "state": "Berlin", "suburb": "Wedding" }, "boundingbox": [ "52.5460929870605", "52.5460968017578", "13.3591794967651", "13.3591804504395" ], "class": "shop", "display_name": "B\u00e4cker Kamps, Bahnsteig U6, Sprengelkiez, Wedding, Mitte, Berlin, 13353, Deutschland, European Union", "icon": "https://nominatim.openstreetmap.org/images/mapicons/shopping_bakery.p.20.png", "importance": 0.201, "lat": "52.5460941", "licence": "Data \u00a9 OpenStreetMap contributors, ODbL 1.0. https://www.openstreetmap.org/copyright", "lon": "13.35918", "osm_id": "317179427", "osm_type": "node", "place_id": "1453068", "type": "bakery" } ```

[smeijer]

Thanks! Appreciated.