bybit_sdk v0.0.4

Refactor WebSocket signature generation and clarify expiry logic

bybit_sdk v 0.0.3

Changed websocket connection establishing window

Fix package dependencies

Fix package dependencies

Bybit SDK (public websocket data handling is improved)

Issues have been solved:

• A public websocket stream's connection closes in the case when a handler for received data is not found (has been removed or is not registered). This case meets every time after an unsubscription is processed. The public stream's behavior is changed, if a handler for received data is not found, the stream doesn't return an error and does nothing.
• In the public and private streams used handlers maps without mutexes. It leads to panic in case when subscription is created for a huge amount of symbols and after a time application tries to subscribe to a new symbol. To solve this issue a thread-safe map implementation is added. Implementation of the public and private streams is changed to use a new thread-safe map where it is needed.