v0.9.2

• Added functions to generate 2D and 3D grid graphs (add_grid_2d() and add_grid_3d())

• Added _ws (with selection) variants of the mutate_[node/edge]_attrs() functions for mutating node or edge attributes for only those nodes/edges in an active selection

• Incorporated an edges argument into the select_edges() function in order to filter the selection of edges to a set of edge ID values

• Reduced the dependency on R to version >= 3.2.0