replace some type specification from any to more accurate and adding more comments

tests/index-spec.ts

@@ -34,8 +34,9 @@ describe("test class RSS: jsonfile", function () {
   let stubListener: sinon.StubbedInstance<Listeners>;
   let stubParser: sinon.StubbedInstance<Parser>;
 
-  const mockedRSSOutput: any = {
-    // TODO any = pas bien
+  const mockedRSSOutput: Parser.Output<{
+    "media:group": { [key: string]: string | [any] };
+  }> = {
     items: [
       {
         title: "my title 00",
@@ -96,7 +97,7 @@ describe("test class RSS: jsonfile", function () {
         }
       });
       stubListener.setParser();
-      stubListener.fetchRSS.resolves(stubParser.parseURL(stubListener.address));
+      stubListener.fetchRSS.returns(stubParser.parseURL(stubListener.address));
     } else throw new Error("myListener need to be initiliaze before the stub");
   };