v0.15.2

RoME v0.15.2

Diff since v0.15.1

Merged pull requests:

• Add generators for helix 2D test graphs (#447) (@dehann)
• rename beehive --> honeycomb (#448) (@dehann)
• new and organize canonical generators, cleanup (#451) (@dehann)
• test canonical Boxes2D!, re-add Beehive w small test (#452) (@dehann)
• better standardize generators (#453) (@dehann)
• v0.15.2-rc1 (#454) (@dehann)
• fix kwarg dfg (#455) (@dehann)