Hyperliquid-python-sdk

Adds support for MultiSig
Bump dependencies for eth-abi, eth-account, and mypy

Handle subaccount for usd_class_transfer

Drops support for python 3.7
Deprecates user_spot_transfer in favor of usd_class_transfer. The new method requires signing by the main wallet. A future backend deploy will stop supporting the old method.
Adds support for sending spot to other users
Adds support for depositing and withdrawing from vaults
Adds support for builder fees

* Adds support for more websocket subscription types
* Adds support for using human readable spot names

* Adds support for meta_and_asset_ctxs and spot_meta_and_asset_ctxs
* Fixes issue with incorrect coin to asset mapping for spot
* Fixes the slippage function to work correctly with spot precision
* Updates spot meta types

* Adds support for new user signed actions (usdSend, approveAgent, and withdraw3)
* Adds support for modifying orders by cloid
* Fixes handling network responses with null error messages
* Small improvements to examples
* Adds user_fees method to retrieve fee information for a user
* Fixes return value of unsubscribe