feat(front): support file as tile response type

Author: agviegas

packages/front/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@thatopen/components-front",
   "description": "Collection of frontend tools to author BIM apps.",
-  "version": "2.3.0-alpha.6",
+  "version": "2.3.0-alpha.7",
   "author": "That Open Company",
   "contributors": [
     "Antonio Gonzalez Viegas (https://github.com/agviegas)",

packages/front/src/fragments/IfcStreamer/index.ts

@@ -65,7 +65,7 @@ export class IfcStreamer extends OBC.Component implements OBC.Disposable {
    */
   useCache = true;
 
-  fetch = async (fileName: string) => {
+  fetch = async (fileName: string): Promise<Response | File> => {
     return fetch(this.url + fileName);
   };