all these changes

frontend/node_modules/@turf/flatten/index.d.ts

@@ -0,0 +1,27 @@
+import {
+  Point,
+  MultiPoint,
+  LineString,
+  MultiLineString,
+  Polygon,
+  MultiPolygon,
+  Feature,
+  FeatureCollection,
+  AllGeoJSON,
+} from "@turf/helpers";
+
+/**
+ * http://turfjs.org/docs/#flatten
+ */
+declare function flatten<T extends Point | MultiPoint>(
+  geojson: Feature<T> | FeatureCollection<T> | T
+): FeatureCollection<Point>;
+declare function flatten<T extends LineString | MultiLineString>(
+  geojson: Feature<T> | FeatureCollection<T> | T
+): FeatureCollection<LineString>;
+declare function flatten<T extends Polygon | MultiPolygon>(
+  geojson: Feature<T> | FeatureCollection<T> | T
+): FeatureCollection<Polygon>;
+declare function flatten(geojson: AllGeoJSON): FeatureCollection<any>;
+
+export default flatten;