[tor-project] Stem Release 1.8

[Damian Johnson]

Hi all, I'm delighted to announce Stem 1.8!

https://blog.atagar.com/stem-release-1-8/

This is the final release in Stem’s 1.x series and with it Python 2.x
support [1]. Over a year in the making, this introduces CollecTor,
bandwidth metric, and HSv3 descriptor support. For a list of
everything that's changed please see...

https://stem.torproject.org/change_log.html#version-1-8

Cheers! -Damian

[1] https://www.python.org/doc/sunset-python-2/