1.9.0

• Created no action timer for pong to encourage players to serve (before there was no penalty to stalling the game forever). Bumped version of all pong environments (pong, basketball_pong, volleyball_pong, foozpong, quadrapong)
• Fixed Multiwalker collision bug, bumped version
• Add state method to Magent and MPE
• Merged rock paper scissors and rock paper scissors lizard spock into a single environment that takes the number of actions as an argument, and adds the n_cycles argument to allow for a single game to be sequential. Bumped version
• Removed depricated env_done method
• Fixed order of channels in combined_arms observation
• Added pixel art based RGB rendering to connect four. This will also be added to rock paper scissors, Go and Texas Holdem in upcoming releases
• Moved pettingzoo CI test files outside of the repo
• Changed max cycles test to be more robust under agent death