Test Release tag on latest head of master

When trying to install quantstrat from GitHub in conda, i get the error Error: no tags found. Apparently this is because the software is not tagged with a release number.

See conda/conda#6674 for a GH issue troubleshooting a similar problem, and see https://help.github.com/en/github/administering-a-repository/managing-releases-in-a-repository for making new releases.