Update Neo4j + packages for more efficient nodes mode

current the nodes mode uses a for loop to call _k_ dikjstra methods. we had to do this because the method only allowed to find the path from the source node to a target node. however now we can find the path from the source node to a list of target nodes [https://neo4j.com/docs/graph-data-science/current/algorithms/dijkstra-source-target/](url)