fixup setup MSVC on Windows like xtensor does

Author: egpbos

.github/workflows/build.yml

@@ -18,6 +18,10 @@ jobs:
                 os: [ubuntu-latest, macos-latest, windows-latest]
 
         steps:
+            - name: Setup MSVC on Windows
+              if: matrix.os == 'windows-latest'
+              uses: ilammy/msvc-dev-cmd@v1
+      
             - name: Checkout repository
               uses: actions/checkout@v3