Updated the AppVeyor configuration

.appveyor.yml

@@ -1,13 +1,29 @@
 #---------------------------------#
 #  Build Image                    #
 #---------------------------------#
-image: Visual Studio 2017
+image: Visual Studio 2022
+
+#---------------------------------#
+#  Install .NET                   #
+#---------------------------------#
+install:
+  - ps: $env:DOTNET_INSTALL_DIR = "$pwd\.dotnetsdk"
+  - ps: mkdir $env:DOTNET_INSTALL_DIR -Force | Out-Null
+  - ps: Invoke-WebRequest -Uri "https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.ps1" -OutFile "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1"
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 2.1 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 3.1 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 5.0 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 6.0 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 7.0 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Channel 8.0 -InstallDir $env:DOTNET_INSTALL_DIR'
+  - ps: $env:Path = "$env:DOTNET_INSTALL_DIR;$env:Path"
+  - ps: dotnet --info
 
 #---------------------------------#
 #  Build Script                   #
 #---------------------------------#
 build_script:
-  - ps: .\build.ps1 -Target AppVeyor
+  - ps: .\build.ps1 --target=CI
 
 #---------------------------------#
 # Tests
@@ -40,7 +56,7 @@ branches:
 #  Build Cache                    #
 #---------------------------------#
 cache:
-- tools -> recipe.cake, tools/packages.config
+- tools -> recipe.cake, .config/dotnet-tools.json
 
 #---------------------------------#
 #  Skip builds for doc changes    #