message: tweak, use const instead of let
diff: @@ -51,7 +51,7 @@ const Download = PluginStateTransform.BuiltIn({
  })({
  apply({ params: p, cache }, plugin: PluginContext) {
  return Task.create('Download', async ctx => {
  - let url = Asset.getUrlAsset(plugin.managers.asset, p.url);
  + const url = Asset.getUrlAsset(plugin.managers.asset, p.url);
  const asset = await plugin.managers.asset.resolve(url, p.isBinary ? 'binary' : 'string').runInContext(ctx);
  (cache as any).asset = asset;
  return p.isBinary
  