Update pytest-runner to 5.3.1#337

pyup-bot wants to merge 1 commit intodevelopinfOpen/cookiecutter-python-project:developfrom

pyup-update-pytest-runner-5.2-to-5.3.1infOpen/cookiecutter-python-project:pyup-update-pytest-runner-5.2-to-5.3.1Copy head branch name to clipboard