IndrajeetPatil/ggstatsplot: ggstatsplot 0.13.4

ggstatsplot 0.13.4 N.B. All statistical analysis in {ggstatsplot} is carried out in {statsExpressions}. Thus, to see changes related to statistical expressions, read the NEWS for that package: https://indrajeetpatil.github.io/statsExpressions/news/index.html MINOR CHANGES Removed Chuck Powell from the contributors list in DESCRIPTION. While Chuck made significant contributions to early versions of the package (2018-2019), all of his code was completely replaced during the 2019 refactoring when statistical functionality was moved to the {statsExpressions} package.