Update gitpython to 3.1.16#169

pyup-bot wants to merge 1 commit intomasterpython-bonobo/bonobo-devkit:masterfrom

pyup-update-gitpython-2.1.8-to-3.1.16python-bonobo/bonobo-devkit:pyup-update-gitpython-2.1.8-to-3.1.16Copy head branch name to clipboard