Pybit

Added
- `all_liquidation_stream` WebSocket topic.
- Batch WebSocket order methods: `place_batch_order`, `amend_batch_order`, `cancel_batch_order`
- HTTP API methods for [Convert](https://bybit-exchange.github.io/docs/v5/asset/convert/guideline), [Earn](https://bybit-exchange.github.io/docs/v5/earn/product-info), and [Crypto Loan](https://bybit-exchange.github.io/docs/v5/crypto-loan/collateral-coin).

Changed
- Renamed the arg `callback_function` in the WebSocket class to `_callback_function` as it's intended to be private and is not useful to the user. This is not the `callback_function` arg you pass when subscribing to a WebSocket topic. ([https://github.com/bybit-exchange/pybit/issues/270](#270))
- Allow passing `None` as a value to an HTTP request, which results in the parameter being removed the final request sent.

Deprecated
- `liquidation_stream` WebSocket topic.

Thanks goes to [Kamsby](https://github.com/Kamsby), [kolya5544](https://github.com/kolya5544), and [LordGhostX](https://github.com/LordGhostX) for contributing to this release.

Added
- Add `fast_execution_stream` WebSocket
- Add `tld` arg to WebSocket. TLD stands for top-level domain.
- Add `delete_sub_uid` and `get_all_sub_api_keys` – user-related HTTP endpoints
- Add `spot_margin_trade_get_historical_interest_rate` – a spot margin HTTP endpoint
- Add `add_or_reduce_margin` – a position HTTP endpoint
- Add `get_transferable_amount` – an account-related HTTP endpoint to complement `get_wallet_balance`
- Add `get_exchange_broker_earnings` (see Deprecated)

Deprecated
- `get_broker_earnings` HTTP endpoint. Instead use `get_exchange_broker_earnings`.

Removed
- All modules under the `legacy` subpackage. All these APIs are offline by this point and their functionality is covered by the V5 API / Unified Trading Account.

Added
- [WebSocket Trading](https://bybit-exchange.github.io/docs/v5/websocket/trade/guideline) support
- Add `get_contract_transaction_log`

Added
- [Demo Trading](https://bybit-exchange.github.io/docs/v5/demo) support
- Add methods for the [Institutional Loan](https://bybit-exchange.github.io/docs/v5/otc/margin-product-info) endpoints
- Add [Account](https://bybit-exchange.github.io/docs/v5/account/wallet-balance) methods `repay_liability()`, `set_collateral_coin()`, `batch_set_collateral_coin()`
- `tld` arg for users in The Netherlands and Hong Kong for `HTTP` sessions

Fixed
- Options WebSocket failing to maintain connection (https://github.com/bybit-exchange/pybit/issues/164)

Changed
- Improved the IP rate limit error message to indicate that an HTTP status code 403 may also mean that the IP address was identified as being from the USA – all requests from USA IPs are [banned](https://t.me/BybitAPI/180420) by Bybit.

Added
- Add RSA authentication for HTTP and WebSocket (choose "Self-generated API Keys" when [creating](https://testnet.bybit.com/app/user/api-management) an API key)
- To use it, pass `rsa_authentication=True` along with your `api_key` and `api_secret`
- Your `api_key` is given to you after inputting your public key (RSA) into Bybit's API management system
- Your `api_secret` is the private key (RSA) you generate
- Learn more [here](https://www.bybit.com/en-US/help-center/bybitHC_Article?id=000001923&language=en_US)
- See examples files: [HTTP](https://github.com/bybit-exchange/pybit/blob/master/examples/http_example_rsa_authentication.py) and [WebSocket](https://github.com/bybit-exchange/pybit/blob/master/examples/websocket_example_rsa_authentication.py)
- Add the `HTTP` method `get_server_time()`
- Add `HTTP` methods for spot margin trading
- Add `HTTP` method `get_long_short_ratio()`
- Add optional `private_auth_expire` arg for WebSocket (https://github.com/bybit-exchange/pybit/pull/154)

Deprecated
- The `HTTP` method `enable_universal_transfer_for_sub_uid()`

Fixed
- Improve `close_position` logic