0.3.6 2021-06-07
    - Adapted the code to work with Graph v0.9717 and later (GH#8).
0.3.5 2021-04-06
    - Increased the workspace size to handle larger and more intricate
      graphs.
0.3.4 2020-10-29
    - Fixed segfaults caused by empty graphs given to are_isomorphic().
0.3.3 2020-09-16
    - Fixed issue with treating edge vertices of one color as the same.
    - Added canonical_order() to get the canonical order of graph
      vertices.
    - Extended POD documentation to cover vertex ordering.
0.3.2 2020-09-10
    - Extended POD documentation to cover vertex and edge colors.
    - Renamed Graph::Nauty::EdgeNode to Graph::Nauty::EdgeVertex to have
      a consistent terminology.
0.3.1 2020-08-28
    - Added comparison of corresponding vertices to are_isomorphic(), as
      only the graph topology was taken into consideration previously.
0.3.0 2020-08-25
    - Switched are_isomorphic() to comparison of canonically labelled
      graphs, as done by nauty.
    - Added orbits_are_same() to compare orbits.
    - orbits are now enumerated based on nauty's canonical labelling of
      vertices.
    - Added installation instructions to the POD (GH#7).
0.2.0 2020-08-19
    - Added support for colored edges.
    - Fixed a typo in POD.
    - Added ppport.h (GH#1).
0.1.2 2020-08-11
    - orbits() now accepts additional ordering subroutine-parameter to
      order nodes of the same color in order to remove a source of
      nondeterminism.
    - Automatically generating minimum Perl version (GH#4).
0.1.1 2020-05-09
    - Added are_isomorphic().
    - Removed a source of nondeterminism of Graph::neighbours() (GH#2).
    - Initializing empty arrays (GH#3).
0.1.0 2020-05-01
    - Initial release.