use msvc on windows

Author: mattip

.github/workflows/numpy.yml

@@ -70,7 +70,7 @@ jobs:
       if: matrix.os != 'macos-latest'
       run: |
         cd repo
-        spin build -j2 --with-scipy-openblas=32 -j2 -- -Ddisable-optimization=true
+        spin build -j2 --with-scipy-openblas=32 -j2 -- -Ddisable-optimization=true --vsenv
 
     - name: Test
       run: |