Alpaca-py

Incompatible Changes
* `get_option_snapshot` returns `OptionsSnapshot` instead of Snapshot
* `get_option_chain` returns `OptionsSnapshot` instead of Snapshot

What's Changed
* feat: Support changes of options snapshots and chain by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/446


**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.20.4...v0.21.0

What's Changed
* Add new colab notebooks inside examples folder by ggrace01 in https://github.com/alpacahq/alpaca-py/pull/440
* Create README.md by ggrace01 in https://github.com/alpacahq/alpaca-py/pull/441
* fix: Add validation to ReplaceOrderRequest by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/445

New Contributors
* ggrace01 made their first contribution in https://github.com/alpacahq/alpaca-py/pull/440

**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.20.3...v0.20.4

What's Changed
* fix: Relax websockets version requirements by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/435


**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.20.2...v0.20.3

What's Changed
* fix: Change profit_loss_pct to List[Optional[float]] in PortfolioHistory model by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/430
* fix: Add Alpaca_APCA ClearingBroker by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/434


**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.20.1...v0.20.2

What's Changed
* feat: Support position intent in order requests by matebudai in https://github.com/alpacahq/alpaca-py/pull/428

New Contributors
* matebudai made their first contribution in https://github.com/alpacahq/alpaca-py/pull/428

**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.20.0...v0.20.1

What's Changed
* chore: Bump black to v24.3.0 by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/425
* Update the default stream URL for options by gnvk in https://github.com/alpacahq/alpaca-py/pull/429
* fix: Fix optional fields of CorporateActionAnnouncement model by hiohiohio in https://github.com/alpacahq/alpaca-py/pull/426


**Full Changelog**: https://github.com/alpacahq/alpaca-py/compare/v0.19.1...v0.20.0