Setup automatic DOI creation for each release of our packages

[srinify]

Problem Description

Inspired by this Alexandra Fogg's issue (https://github.com/sdv-dev/Copulas/issues/387), academic journals strongly prefer using DOI's (digital object identifiers) when referencing external work.

Solution

To make it easier for researchers to reference our software packages in their papers, it would be helpful to have DOI's for each release of any of our public software packages.