[Weather] get current air quality information

Description

Get current air quality situation.

Documentation: https://docs.api.tfl.lu/v1/en/RESTAPIs/Weather/AirQuality/

Access the API: https://api.tfl.lu/v1/Weather/Airquality

Here's an example:

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    5.976941,
                    49.505011
                ]
            },
            "properties": {
                "id": "aev:Esch-Alzette",
                "name": "Esch-Alzette",
                "temp": 5.5,
                "pm10": 52,
                "no2": 24.8,
                "o3": 41,
                "so2": 1.2,
                "co": 0.3,
                "last_update": "1486998000000"
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    6.305332,
                    49.722229
                ]
            },
            "properties": {
                "id": "aev:Beidweiler",
                "name": "Beidweiler",
                "temp": 4.1,
                "pm10": 27,
                "no2": 11,
                "o3": 64,
                "so2": 2.9,
                "co": null,
                "last_update": "1486998000000"
            }
        }, {
            ...
        }]
}