title: How to update kepler.gl mapstyle
body: <p>I'm working on kepler.gl map and I have custom map style, trying to update the default map style using <code>addCustomMapStyle</code> and <code>loadCustomMapStyle</code> but those two methods not updating the map style my config is </p>
  
  <pre><code>    {
    "version": "v1",
    "config": {
      "visState": {
  
      },
      "mapState": {
        "bearing": -14.78125,
        "dragRotate": true,
        "latitude": 50.15584222999782,
        "longitude": 8.73812510739856,
        "pitch": 55.64219672692688,
        "zoom": 6.249643007871772,
        "isSplit": false
      },
      "mapStyle": {
        "styleType": "0.ek919ez82er",
        "topLayerGroups": {},
        "visibleLayerGroups": {
          "border": false,
          "building": true,
          "label": true,
          "land": true,
          "road": true,
          "water": true
        },
        "buildingLayer": {
          "color": [
            18,
            25,
            38
          ],
          "isVisible": false,
          "opacity": 0.7
        },
        "mapStyles": {
          "0.ek919ez82er": {
            "accessToken": "accessToken",
            "custom": true,
            "icon": "BASE64IMAGE",
            "id": "0.ek919ez82er",
            "label": "Basic Template New",
            "url": "mapbox://styles/stephanefoulard/cjnvki2i00s9v2sjrbzpssze0"
          }
        }
      }
    }
  }
  </code></pre>
  
  <p>how can i load this custom map style, it's load the dark map style right now, please any help</p>