This release includes a fix for an oversight in the previous 0.7.0 and 0.6.0 releases. Those releases both added custom return types `BFSSuccessors`, `NodeIndices`, `EdgeList`, and `WeightedEdgeList` that implemented the Python sequence protocol which were used in place of lists for certain functions and methods. However, none of those classes had support for being pickled, which was causing compatibility issues for users that were using the return in a context where it would be pickled (for example as an argument to or return of a function called with multiprocessing). This release has a single change over 0.7.0 which is to add the missing support for pickling `BFSSuccessors`, `NodeIndices`, `EdgeList`, and `WeightedEdgeList` which fixes that issue.