message: CI: newer mingw
diff: @@ -13,8 +13,8 @@ environment:
  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015 # used as mingw
  GENERATOR: "Ninja"
  - CC: C:/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/gcc.exe
  - CXX: C:/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/g++.exe
  + CC: C:/msys64/mingw64/bin/gcc.exe
  + CXX: C:/msys64/mingw64/bin/g++.exe
  - APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu2004
  GENERATOR: ""
  @@ -37,7 +37,7 @@ install:
  if($IsWindows) {
  # debug
  - $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
  + # $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
  # Vulkan SDK
  $env:VK_SDK_PATH = "C:/VulkanSDK/$VK_SDK"
  Invoke-WebRequest -Uri https://sdk.lunarg.com/sdk/download/$VK_SDK/windows/VulkanSDK-$VK_SDK-Installer.exe -OutFile VulkanSDK.exe
  