--> on branch X-Y-Z, edit RELEASES.md to finalize X.Y.Z info
--> merge master branch into X-Y-Z branch
--> run `make pytest-all`
--> check docs/index.html for any needed edits
--> commit X-Y-Z branch and push to origin
--> merge X-Y-Z branch into master branch on GitHub
--> on local master branch, ./gitsync
--> create release X.Y.Z on GitHub using master branch
--> run `pbrelease Behavioral-Responses behresp X.Y.Z` [to bld/upload packages]
--> email policybrains-modelers list about the new release and packages