[BUG] Subserver Gateway doesn't show live data

[johnzoki]

Subserver Subway doesn't show live data
The number of members in voice channels of a Subserver, the number of members selected a Subserver as main-server and the number of members who joined a Subserver doesn't update in the dedicated Subserver Subway.

To Reproduce
Steps to reproduce the behavior:

1. Join a channel of any Subserver
2. See if the Subway changed the first value in its tuple

Expected behavior
The values in the Subserver Subway should show the number of all members currently in any voice channel in the dedicated Subserver, the number of members who selected this Subserver as their current main server and the number of every member who joined this Subserver

Bot Version:
1.4.0

[PantomInach]

This bug is due to the rate limit of the API calls the bot is allowed to do. It seems that when trying to update the Subchannel information every time the voice state of a user changes is too much.
The critical function seems to be cogs.commandsubserver.update_subserver_info() in file.