v0.8

• Revised many graph functions so they work better together
• Added many testthat tests to maintain the quality of the graph functions
• Added functions create_random_graph(), import_graph(), combine_graphs(), country_graph() and select_graph_from_series()
• Added support for visNetwork graphs as a rendering option with render_graph

v0.7

• Renamed functions graphviz_graph and graphviz_render to create_graph and render_graph, respectively
• Removed function graphviz_export (exporting now handled with render_graph)
• Added several new functions to inspect, analyze, and modify graphs: display_graph_object, node_info, edge_info, node_present, edge_present, get_nodes, get_edges, get_predecessors, get_successors, node_count, edge_count, is_graph_empty, is_graph_directed, add_node, add_edges, delete_node, delete_edge, node_type, edge_relationship, create_series, add_to_series, remove_from_series, graph_count, subset_series, trigger_script, render_graph_from_series, series_info

v0.6

• Added several functions to work with graphs: create_nodes, create_edges, combine_nodes, combine_edges, scale_nodes, scale_edges, get_nodes, node_info, graphviz_graph, graphviz_render, and graphviz_export
• Removed the graphviz_nodes_edges_df and graphviz_single_df functions