trove classifiers (and thus pypi meta information) need to be updated

[willkg]

kinto-http.py/setup.py

Line 45 in 8fc639e

"Programming Language :: Python :: 2.7",

https://pypi.python.org/pypi/kinto-http/

That suggests kinto-http works with Python 2 which it doesn't for 8.0+.

This issue covers updating the trove classifiers and pushing a new release which will update the meta information at the bottom of the PyPI page.

[willkg]

Yesterday, I was trying to remember which project I wrote this issue up for so I could do a PR, but I couldn't remember. Sorry about that. Thank you for fixing it!