SB3-Contrib v2.0.0: Gymnasium Support

Warning
Stable-Baselines3 (SB3) v2.0 will be the last one supporting python 3.7 (end of life in June 2023).
We highly recommended you to upgrade to Python >= 3.8.

SB3 Contrib (more algorithms): https://github.com/Stable-Baselines-Team/stable-baselines3-contrib
RL Zoo3 (training framework): https://github.com/DLR-RM/rl-baselines3-zoo
Stable-Baselines Jax (SBX): https://github.com/araffin/sbx

To upgrade:

pip install stable_baselines3 sb3_contrib rl_zoo3 --upgrade

or simply (rl zoo depends on SB3 and SB3 contrib):

pip install rl_zoo3 --upgrade

Breaking Changes

• Switched to Gymnasium as primary backend, Gym 0.21 and 0.26 are still supported via the shimmy package (@carlosluis, @arjun-kg, @tlpss)
• Upgraded to Stable-Baselines3 >= 2.0.0

Bug fixes

• Fixed QRDQN update interval for multi envs

Others

• Fixed sb3_contrib/tqc/*.py type hints
• Fixed sb3_contrib/trpo/*.py type hints
• Fixed sb3_contrib/common/envs/invalid_actions_env.py type hints

Full Changelog: v1.8.0...v2.0.0