Update appveyor.yml
Update appveyor.yml

Former-commit-id: edfc65e4f0ee3db30c0051c9e79421cddb472b0e
mpharrigan/conda-recipes,danielparton/omnia-md-conda-recipes,marscher/omnia-conda-recipes,cwehmeyer/conda-recipes,swails/conda-recipes,cwehmeyer/conda-recipes,marscher/omnia-conda-recipes,cwehmeyer/conda-recipes,swails/conda-recipes,rmcgibbo/conda-recipes,rmcgibbo/conda-recipes,rmcgibbo/conda-recipes,swails/conda-recipes,cwehmeyer/conda-recipes,peastman/conda-recipes,peastman/conda-recipes,jchodera/conda-recipes,jchodera/conda-recipes,omnia-md/conda-recipes,omnia-md/conda-recipes,mpharrigan/conda-recipes,marscher/omnia-conda-recipes,rmcgibbo/conda-recipes,jchodera/conda-recipes,mpharrigan/conda-recipes,marscher/omnia-conda-recipes,peastman/conda-recipes,jchodera/conda-recipes,danielparton/omnia-md-conda-recipes,omnia-md/conda-recipes,swails/conda-recipes