1.1.1

• Support MetaDrive environment, and provide examples;
• Refine the configuration settings for the gym-pybullet-drones environment;
• Fix some issues about models saving;
• Revise the model loading method;
• Implement a configuration option for selecting different activation function of the output layer of actors for continuous control;
• Update the corresponding examples to adapt the above changes;
• Fix some other bugs.
• Improve some algorithms, such as SAC, MASAC, DDPG, and TD3, etc.
• Add multi-robot warehouse (RWARE) environment.
• n_size -> buffer_size;
• The saving and loading of observation status;
• Unify the names of attributes for both single-agent and multi-agent DRL.