Update promise resolution in TestServer

Modified the promise resolution in the TestServer class to explicitly resolve with undefined instead of no arguments

Author: daniyelnnr

src/HttpClient/middlewares/request/setupAxios/__tests__/TestServer.ts

@@ -55,7 +55,7 @@ export class TestServer {
           return reject(err)
         }
 
-        resolve()
+        resolve(undefined)
       })
     })
   }