chaosmonk/pip @ b4e0efc4fae251ec8ba9a4c0e11336455ce81b5f

Pradyun Gedam 31c2389304 Merge pull request #5560 from pradyunsg/python-37-yaml-hack		6 lat temu
..
travis	66b2c7f7ba Move Travis files into tools/	6 lat temu
docs-requirements.txt	c57705d1e4 Move requirements files to tools/	6 lat temu
lint-requirements.txt	85e000ede6 Upgrade to newer isort	6 lat temu
tests-requirements.txt	1962198861 Remove hack for pyyaml support on 3.7	6 lat temu