Use PowerShell Core for build.

tillig · tillig · commit cd7cd130f6d2 · 2022-12-08T10:57:18.000-08:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -10,4 +10,4 @@ environment:
 clone_depth: 1
 
 build_script:
-- ps: .\build.ps1
+- pwsh: .\build.ps1
