change appveyor to support .net8

Signed-off-by: nivalxer <nivalxer@gmail.com>
2023-12-29 22:48:27 +08:00 · 2023-12-29 22:48:27 +08:00 · 392137ecb3
--- a/appveyor.yml
+++ b/appveyor.yml
@ -1,7 +1,7 @@
 version: 0.7.0.{build}
 pull_requests:
  do_not_increment_build_number: true
-image: Visual Studio 2019
+image: Visual Studio 2022
 build_script:
 - cmd: powershell .\build.ps1 -target PR
 test: off