Correct changelog entries for v108, v109 and v110 (#469)
Correct changelog entries for v108, v109 and v110 (#469)

Found by diffing the published buildpack archives and looking at the
git log to see what changed. It looks like the v108 entry was
accidentally added in #405, when the release being published there
was actually v107. The setuptools update mentioned there never
happened, since the `SETUPTOOLS_VERSION` variable was found to be
unused and instead removed.
AltSchool/heroku-buildpack-python,Scalingo/python-buildpack,benmurden/heroku-buildpack-python-ember,benjaminfox/heroku-buildpack-python-geoip,skilljar/heroku-buildpack-python,edmorley/heroku-buildpack-python,Scalingo/python-buildpack,benmurden/heroku-buildpack-python-ember,joshfriend/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,ad-m/heroku-buildpack-python,heroku/heroku-buildpack-python,AltSchool/heroku-buildpack-python,ad-m/heroku-buildpack-python,heroku/heroku-buildpack-python