fix(resolve in updateSource): added missing resolve

Resolve call was missing in `updateSource` both on iOS and Android.

Author: benedictstrube

src/ui-mapbox/index.android.ts

@@ -2410,7 +2410,7 @@ export class Mapbox extends MapboxCommon implements MapboxApi {
      *
      */
     updateSource(id: string, options: UpdateSourceOptions, nativeMap?) {
-        return new Promise((resolve, reject) => {
+        return new Promise<void>((resolve, reject) => {
             try {
                 const theMap: com.mapbox.mapboxsdk.maps.MapboxMap = nativeMap || this._mapboxMapInstance;
                 if (!theMap) {
@@ -2427,6 +2427,7 @@ export class Mapbox extends MapboxCommon implements MapboxApi {
                     case 'geojson':
                         const geoJsonString = JSON.stringify(options.data);
                         (source as com.mapbox.mapboxsdk.style.sources.GeoJsonSource).setGeoJson(geoJsonString);
+                        resolve();
                         break;
                     default:
                         reject('Invalid source type: ' + options['type']);

src/ui-mapbox/index.ios.ts

@@ -2663,7 +2663,7 @@ export class Mapbox extends MapboxCommon implements MapboxApi {
      *
      */
     updateSource(id: string, options: UpdateSourceOptions, nativeMap?) {
-        return new Promise((resolve, reject) => {
+        return new Promise<void>((resolve, reject) => {
             try {
                 const theMap: MGLMapView = nativeMap || this._mapboxViewInstance;
                 if (!theMap) {
@@ -2682,6 +2682,7 @@ export class Mapbox extends MapboxCommon implements MapboxApi {
                         const nsData: NSData = content.dataUsingEncoding(NSUTF8StringEncoding);
                         const geoJsonShape = MGLShape.shapeWithDataEncodingError(nsData, NSUTF8StringEncoding);
                         (source as MGLShapeSource).shape = geoJsonShape;
+                        resolve();
                         break;
                     default:
                         reject('Invalid source type: ' + options['type']);