tiktok: use new cookie for each request (#514)

* api: allow passing headers from service handler

* tiktok: use new cookie for each request

src/modules/stream/shared.js

@@ -1,5 +1,4 @@
 import { genericUserAgent } from "../config.js";
-import { cookie as tiktokCookie } from "../processing/services/tiktok.js";
 
 const defaultHeaders = {
     'user-agent': genericUserAgent
@@ -14,9 +13,6 @@ const serviceHeaders = {
         origin: 'https://www.youtube.com',
         referer: 'https://www.youtube.com',
         DNT: '?1'
-    },
-    tiktok: {
-        cookie: tiktokCookie
     }
 }