fix: wrong MBTilesTileDataSource parent class

Author: farfromrefug

src/datasources/mbtiles.d.ts

@@ -3,4 +3,4 @@ import { DataSource, TileDataSource, TileDataSourceOptions } from '.';
 export interface MBTilesTileDataSourceOptions extends TileDataSourceOptions {
     databasePath?: string;
 }
-export class MBTilesTileDataSource extends DataSource<any, MBTilesTileDataSourceOptions> {}
+export class MBTilesTileDataSource extends TileDataSource<any, MBTilesTileDataSourceOptions> {}