Upgrade to latest "Gym"

[markub3327]

Hello,

the Gym will be soon outdated. Gym since 2021 has moved all future development to Gymnasium. The small changes must be done:

AttributeError: 'EnvSpec' object has no attribute trials

Gymnasium hasn't trials parameter

_obs, reward, done, truncated, _ = env.step(action)

The new step() method has done parameter as end of the game and truncated parameter as the timeout for solving the game (not the end of episode).

obs, _ = env.reset()

The new reset() method has after obs param the info param similar to old step() method.

Thanks.