Do not use default exports

src/model/data/map.ts

@@ -1,12 +1,10 @@
-import {mapFromObject} from '../../util';
-
-interface Input {
+export interface Input {
 	readonly tiles: string[];
 	readonly collision: boolean[][];
 	readonly layers: number[][][];
 }
 
-export default class MapData {
+export class MapData {
 	public readonly tiles: string[];
 	public readonly collision: boolean[][];
 	public readonly layers: number[][][];