Unicorn-binance-local-depth-cache

Added
- threading.Lock(): `self.threading_lock_ask` and `self.threading_lock_bid`

Added
- `set_refresh_request()`

Added
- Binance Futures support (exchange="binance.com-futures")
Changed
- `create_depth_cache()` renamed parameter `market` to `markets`. `markets` can be a str or a list of one or more market symbols
- `stop_depth_cache()` renamed parameter `market` to `markets`. `markets` can be a str or a list of one or more market symbols
- Renamed `stop_manager()` to `stop_manager_with_all_caches()`
Removed
- `create_depth_caches()`
- `stop_depth_caches()`

Initial Release!