Merge pull request #5403 from jefferyto/python-attrs-17.4.0
authorHannu Nyman <hannu.nyman@iki.fi>
Wed, 10 Jan 2018 16:20:25 +0000 (18:20 +0200)
committerGitHub <noreply@github.com>
Wed, 10 Jan 2018 16:20:25 +0000 (18:20 +0200)
python-attrs: update to 17.4.0, add python3 variant


Trivial merge