PettingZoo 1.23.1

PettingZoo 1.23.1 Release Notes:

This release is a small hotfix to fix compatibility issues with Shimmy and other small bugs.

Bug Fixes:

• Fix bug in API test test_action_flexibility() (#986)
  • Fixes tests for Shimmy's OpenSpiel wrapper
• Remove ParrellEnv.seed() (#987)
• Update RLlib requirements (#992)
  • Note: RLlib's PettingZoo wrapper is currently broken, but will be fixed with ray-project/ray#34696 and ray-project/ray#32999

Documentation Updates:

• Add info about aec and parallel APIs to homepage (#985)
• Create CITATION.cff (#990)
• Added Carla gym to third_party_envs.md (#991)

Full Changelog: 1.23.0...1.23.1