Bump mujoco-py version number.

Version 2.0.2.2

Bump version to 2.0.2.1

Final release of Mujoco-py 2.0 (openai#371)

* Updated README documentation.

* Removed the 'alpha' pre-release version info.

* Fixing pip install command that seems to help with docker build in CI.

* Updating README to the next major version.

Mujoco v2.0 (openai#368)

* Add build directory to the git ignore file.

* Updating mujoco-py for mujoco 2.0

* Removing commented out test.

* Remove windows support.

* Alpha version prerelease.

bump version

1.50.1.0! 🎉

Added actuator_names and camera_names as properties. (openai#27)

* Expose actuator names in the MjModel class.

* Added camera_names as property.