What's Changed
* Refactor event handler contracts, in preparation for model inference by marijnvanderhorst in https://github.com/marketredesign/pricecypher_python_sdk/pull/35
_Major enhancements to the "event handler" contracts / abstract classes provided by this SDK. For instance, allows for much construction of model inference runtimes (runtimes are outside the responsibility of this SDK, but generic APIs that can be re-used across different external runtime implements are within the scope of this SDK)._
**Full Changelog**: https://github.com/marketredesign/pricecypher_python_sdk/compare/v2.1.0...v3.0.0