Resolve "simple pathfinding"

Closes #120 (closed)

cooperative_cuisine/state_representation.py

@@ -211,7 +211,7 @@ def create_movement_graph(state: StateRepresentation, diagonal=True) -> Graph:
     free_space = np.ones((width, height), dtype=bool)
     for counter in state["counters"]:
         grid_idx = np.array(counter["pos"]).round().astype(int)
-        free_space[*grid_idx] = False
+        free_space[grid_idx[0], grid_idx[1]] = False
 
     graph = networkx.Graph()
     for i in range(width):