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:

    {
        "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.