0.2.1

Highlights

• BaseModel gained a custom model_validator that guards against ambiguous model
  selection from union types in nested models.
• Relaxed version requirements of pydantic and more-itertools

Merged PRs

• Model Unions are validated by @befelix in #46
• Dependencies versions are relaxed by @befelix in #47
• Changelog markdown suffix added by @befelix in #48

Full Changelog: v0.2.0...v0.2.1