v0.2.0

• Added:
  • C-style comment and string interpolation
  • show dimension in edge label with rank option (e.g.: rank: [2,8] automatically appends [1:0][7:0] to the label)
  • edge bus visual width override by edge_bus_visual_width argument of hdelk.layout function (e.g. hdelk.layout(graph, "diagram", edge_bus_visual_width=3)).