What's Changed
* Adding support for custom discriminator fields by janosdebugs in https://github.com/arcalot/arcaflow-plugin-sdk-python/pull/18
* Fixes 21: Unclear error message by janosdebugs in https://github.com/arcalot/arcaflow-plugin-sdk-python/pull/24
* Fixes 19: dict support without typing by janosdebugs in https://github.com/arcalot/arcaflow-plugin-sdk-python/pull/23
**Full Changelog**: https://github.com/arcalot/arcaflow-plugin-sdk-python/compare/0.3.0...0.4.0