Change current osu! state provider's connection to websockets

[AndrefHub]

Currently we use HTTP GET request. For gosumemory it works fine as response's delay is usually less than 200ms.
On other hand, StreamCompanion often takes a lot of time to respond and sometimes even takes exceeds 2s timeout (which should be more than enough!).

Only fix I can think of right now is changing connection to websockets, so we can be certain we'll get some data (although it may be outdated).