in analogy with the graph.remove_infected() and graph.remove_susceptible() methods, add a graph.remove_recovered() method to the graph package that takes a node or list of nodes,and removes those nodes from the recovered list, and adds them to the susceptible list.
in analogy with the graph.remove_infected() and graph.remove_susceptible() methods, add a graph.remove_recovered() method to the graph package that takes a node or list of nodes,and removes those nodes from the recovered list, and adds them to the susceptible list.