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

Merge pull request #196 from ljwolf/geary-nans

fix silently passing over NaN values

Merge pull request #188 from ljwolf/v2.4.1

add pygeos-tolerant fails for the module

release v 2.4.0