Update workalendar to 3.1.1#96

pyup-bot wants to merge 1 commit intomastertunnell/time_range:masterfrom

pyup-update-workalendar-2.3.1-to-3.1.1tunnell/time_range:pyup-update-workalendar-2.3.1-to-3.1.1Copy head branch name to clipboard