message: improvement - EffectResponse as interface
diff: @@ -2,11 +2,11 @@ import { Observable } from 'rxjs';
  import { HttpRequest, HttpResponse } from '../http.interface';
  import { StatusCode } from '../util';
  -export type EffectResponse = {
  - status: StatusCode,
  - body?: object,
  - headers?: Record<string, string>,
  -};
  +export interface EffectResponse {
  + status: StatusCode;
  + body?: object;
  + headers?: Record<string, string>;
  +}
  export type Effect<T = EffectResponse, U = any> = (
  request$: Observable<HttpRequest>,
  