message: added suppport for async templates
diff: @@ -9,7 +9,7 @@ export default class Eta extends TemplateEngine {
  super(site, options);
  eta.configure({
  - views: this.includes,
  + views: site.src(this.includes),
  useWith: true,
  });
  @@ -30,7 +30,11 @@ export default class Eta extends TemplateEngine {
  return await fn(data, eta.config);
  }
  - addFilter(name, fn) {
  + addFilter(name, fn, async) {
  this.filters[name] = fn;
  +
  + if (async) {
  + eta.configure({ async: true });
  + }
  }
  }
  