Make DownloadModelOptions (mostly) optional.

Bump version 2.0.2

Author: frenchtoast747

package.json

@@ -1,6 +1,6 @@
 {
     "name": "webgl-obj-loader",
-    "version": "2.0.1",
+    "version": "2.0.2",
     "description": "A simple OBJ model loader to help facilitate the learning of WebGL",
     "main": "dist/webgl-obj-loader.min.js",
     "types": "dist/index.d.ts",

src/utils.ts

@@ -64,12 +64,12 @@ function getMtl(modelOptions: DownloadModelsOptions): string {
 
 export interface DownloadModelsOptions {
     obj: string;
-    mtl: boolean | string;
-    downloadMtlTextures: boolean;
-    mtlTextureRoot: string;
-    name: string;
-    indicesPerMaterial: boolean;
-    calcTangentsAndBitangents: boolean;
+    mtl?: boolean | string;
+    downloadMtlTextures?: boolean;
+    mtlTextureRoot?: string;
+    name?: string;
+    indicesPerMaterial?: boolean;
+    calcTangentsAndBitangents?: boolean;
 }
 
 type ModelPromises = [Promise<string>, Promise<Mesh>, undefined | Promise<MaterialLibrary>];