Update certifi from 2018.8.13 to 2018.8.24 (#3946)
Update certifi from 2018.8.13 to 2018.8.24 (#3946)


KWierso/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder