Log Message:
py-txtorcon: updated to 20.0.0

v20.0.0:
I'm pleased to announce txtorcon 20.0.0. This fixes a few bugs and
officially deprecates Python 2 support.

 * Use real GeoIP database or nothing (https://github.com/meejah/txtorcon/issues/250)
 * Change abstract base classes import in preperation for Python 3.8
 * Python 3.4 is no longer supported
 * Python 2 is deprecated; all new code should be Python 3. Support
   for Python 2 will be removed in a future release.