Python 3.14 support, new env variant, and stability updates

Changes since v1.10.2

Compatibility

• Added Python 3.14 support.
• Dropped Python 3.9 support.
• Fixed NumPy 2.0 compatibility.
• Modernized build configuration.

CI and build tooling

• Added CI/install support for pygame system dependencies.
• Installed SDL2/freetype/portmidi packages for docs/build environment.

Bug fixes

• Fixed SubprocVecEnv ConnectionResetError with forkserver/spawn.
• Fixed zero division in LinearSpline2D.
• Fixed divide-by-zero warning in LidarObservation.
• Fixed incorrect coordinate transformation in spline.

Features and docs

• Added a generic version of the roundabout environment.
• Refreshed docs branding and added mise/just tooling.
• Updated docs workflows and README content.
• Added multiple paper citations / references.

Bug fixes and new env

• Adds racetrack-oval-v0
• Minor fixes

Gymasium v1.0 support

Fix release workflow

Gymnasium v1.0 support

Update to support Gymnasium v1.0

Update release version

(Didn't see that the version definition had been moved from config to init)

Bug fixes

• Fix creation of vehicles in parking env
• Bug fixes for kinematics observation
• Fix Lidar observation
• Fix boundaries check in occupancy grid observation
• Update docs
• Update numpy deprecated calls
• Fix road priorities
• Fix non-determinism in route planning
• Fix multiagent wrapper for intersection env

Hotfix of parking env reward function

• Fix collision reward in parking env
• Minor update of documentation and workflows
• Minor update of example notebooks
• Update rendering logic

Hotfix of env registration entrypoint with gymnasium

v1.8.1

Release 1.8.1

Move from gym to gymnasium

• fix vehicle order in occupancy grid obs
• fix broken seeding implementation
• support numpy types for discrete actions
• use Runge-Kutta 4 integration for dynamical continuous actions, making the dynamics make more stable
• use gymnasium rather than gym

Hotfix of parking env init

Fixes #400