Missing pypi dependency for dateutil

[magicbadger]

When using this package as a fresh install from pypi, the module dateutil is reported as missing

   self._target(*self._args, **self._kwargs)
  File "radiovis-server.py", line 45, in launch_provider
    from spi.xml import unmarshall
  File "/Users/poor/.pyenv/versions/3.8.0/lib/python3.8/site-packages/spi/__init__.py", line 26, in <module>
    from dateutil.tz import tzlocal
ModuleNotFoundError: No module named 'dateutil'

This should be listed as a dependency in the pypi configuration and in the documentation