Move the ListenerRSSInfos inside the ListenerRSS namespace

tests/index-spec.ts

@@ -2,10 +2,9 @@
 import * as Parser from "rss-parser";
 
 // tested class
-import {
-  ListenerRSSInfos as ListenerRRSInfo,
-  ListenerRss as Listeners,
-} from "../";
+import { ListenerRss } from "../";
+
+const ListenerRSSInfo = ListenerRss.Config;
 
 // Unit test
 import assert from "assert";