api/stream/shared: add tiktok headers

referer is now required to access video links

Author: wukko

api/src/stream/shared.js

@@ -19,6 +19,9 @@ const serviceHeaders = {
     },
     vk: {
         'user-agent': vkClientAgent
+    },
+    tiktok: {
+        referer: 'https://www.tiktok.com/',
     }
 }