Issue running Pupper example on MacOS and Manjaro Linux

[mrElnekave]

When calling pip install -e . and getting all the install requirements for Puppersim we run into some issues, code shown below. This stems from the new gym as of now 26.2 treating the registry module differently: openai/gym#3097.

Hotfix:

pip install gym==0.21.0  # roll back to previous version
pip install protobuf==3.20.0
!pip install importlib-metadata==4.13.0

Even after you apply the hotfix, two packages were missing:
packaging and six.