Use dask instead of multiprocessing for lunar lander tutorial (#346)

[yutaizhou]

Description

fixes #346

Also encountered an issue with box2d not installing properly. Thus, this PR also moves swig installation before box2d so that swig is available when box2d is being built. See https://github.com/Farama-Foundation/Gymnasium/issues/662 for more info

TODO

• [ ] test code on linux machine

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go