0.10.0

• add set_state, get_state methods to save/restore environment state
• new flags: use_backgrounds, restrict_themes, use_monocrhome_assets
• switch to use gym3 instead of libenv + Scalarize, gym and baselines.VecEnv interfaces are still available with the same names, the gym3 environment is called ProcgenGym3Env
• zero initialize more member variables
• changed info dict to have more clear keys, prev_level_complete tells you if the level was complete on the previous timestep, since the info dict corresponds to the current timestep, and the current timestep is never on a complete level due to automatic resetting. Similarly, prev_level_seed is the level seed from the previous timestep.
• environment creation should be slightly faster