Resolving breaking changes leading up to Gym 1.0

[ryanrudes]

Gym 1.0, according to the developers' roadmap, will introduce a number of breaking changes and deprecations that will necessitate appropriate changes to colabgymrender. The ones of concern are mainly:

• Updated render API requires render mode to be provided at environment initialization, rather than on step()
• Updated step API will soon return 5 outputs, that is, observation, reward, terminal, truncation, info
• Updated reset will always return info now, in addition to observation

As of right now, the plan for colabgymrender is to play along with these new changes by incrementing the major version of this package to avoid any strange surprises. We'll probably introduce colabgymrender==2.0.0 around the same time gym introduces its first major version.

UPDATE (10/02/22)

I have created a new branch gym-1.0. All pull requests targeted at resolving recent breaking changes in gym will be referred to this branch. Once gym version 1.0 is released, this branch will be merged with the base. See #8 and #9.

Feel free to discuss your opinion on this roadmap below. #

[ryanrudes]

Code maintenance has been moved to a separate repository named renderlab.