Handprint

Changes in this release:
* Beginning with this release, the license for Handprint is now an unmodified [BSD 3-clause](https://opensource.org/licenses/BSD-3-Clause), instead of the previous Caltech-specific modified version of the license.
* Some versions of dependencies in `requirements.txt` have been updated.

Changes in this release:
* The internal `network` module is gone; instead, this uses the equivalent functions from [CommonPy](https://github.com/caltechlibrary/commonpy)'s `network_utils` module.
* `Makefile` has a fix for updating `CITATION.cff`.
* Some dependency versions have been updated in `requirements.txt`.
* There is a new `requirements-dev.txt` file for installing dependencies needed to run test cases using `pytest`.
* There are new test cases.

Changes in this release:

* Update dependency versions specified by `requirements.txt` and `Pipfile`, to address a security issue in Pillow, update to CommonPy, and some other version updates.
* Fix to a bug in the image resizing code involving calls to debug log functions.
* Updates to copyright years in files.
* Addition of a `CITATION.cff` file to the repository on GitHub

This release fixes a crash that occurs the first time someone tries to install credentials files.

There are no functional changes in this release; the changes all concern code dependencies and installation instructions.

* The requirements in `requirements.txt` now pin the versions of Python packages needed.
* `Pipfile` and `Pipefile.lock` files are now provided for use with [pipenv](https://pipenv.pypa.io).
* Imports of [sidetrack](https://github.com/caltechlibrary/sidetrack) now refer to the latest API.
* The installation instructions in the [README](README.md) file now include information about using [pipx](https://pypa.github.io/pipx/).

(Retracted.)