Release v1.1.1

The requirements.txt file had too many requirements. Only pytest is needed, and only for running the test suite.
The PyPI setup.py file didn't have any requirements listed, so installation from PyPI was incomplete.
These issues have now been rectified.

Full Changelog: v1.1.0...v1.1.1

Release v1.1.0

Added the version number as a static function of the Hasher class.
Published to PyPI.

Release v1.0.0

Version tested on Windows 10 (Python 3.7) and Ubuntu 20.04 (Python 3.8).
Not tested on Macintosh.