Upgrade cookie to 0.15 and cookie_store to 0.13.0

cookie_store default features pulls in reqwest, so we stop that
by specifying the exact features wanted.

src/cookies.rs

@@ -43,6 +43,6 @@ impl CookieTin {
         I: Iterator<Item = cookie::Cookie<'static>>,
     {
         let mut store = self.inner.write().unwrap();
-        store.store_response_cookies(cookies, url)
+        store.store_response_cookies(cookies, url);
     }
 }