Merge pull request #439 from leehach/shape-notebook

Shape notebook

correct fourth moment calculation for total randomization null (#391)

* fix submitted in #390 by @Katterrina

* fix test for #390

Version 2.5.0

Merge pull request #209 from pysal/dependabot/github_actions/actions/…

…setup-python-4

Bump actions/setup-python from 3 to 4