message: fix: default value for client options
diff: @@ -115,7 +115,9 @@ export default class Client {
  }
  public static getOption<IOption = any>(key: string, defaultValue?: IOption): IOption {
  - return <IOption> Client.getOptions().get(key) || defaultValue;
  + let value = Client.getOptions().get(key);
  +
  + return <IOption> (typeof value !== 'undefined' ? value : defaultValue);
  }
  public static setOption(key: string, value) {
  