ProPlot author here: Due to my day job as a graduate student, certain feature additions may be delayed to the summer of 2020. In the meantime, if you are interested in contributing to ProPlot, please see the contribution guide. Any amount of help is welcome!
Like edges but for 2d arrays.
The size of both axes are increased by one. This is used
internally to calculate graitule edges when you supply centers to
pcolor or pcolormesh.