Revert "moved loader away from parse function"

This reverts commit 6fe0f85b5e57a5d7094acd26dcd7861c1a1c8078.

example/index.js

@@ -93,15 +93,14 @@ function reinstantiateTiles() {
 	const dracoLoader = new DRACOLoader();
 	dracoLoader.setDecoderPath( 'https://unpkg.com/three@0.123.0/examples/js/libs/draco/gltf/' );
 
-	const loader = new GLTFLoader( tiles.manager );
-	loader.setDRACOLoader( dracoLoader );
-
 	tiles = new TilesRenderer( url );
 	tiles.fetchOptions.mode = 'cors';
 	tiles.manager.addHandler( /\.gltf$/, {
 
 		parse( ...args ) {
 
+			const loader = new GLTFLoader( tiles.manager );
+			loader.setDRACOLoader( dracoLoader );
 			return loader.parse( ...args );
 
 		}