Update xarray to 0.11.3#173

pyup-bot wants to merge 1 commit intomasterClimateImpactLab/impax:masterfrom

pyup-update-xarray-0.10.2-to-0.11.3ClimateImpactLab/impax:pyup-update-xarray-0.10.2-to-0.11.3Copy head branch name to clipboard