Remove .NET 6.0 and add .NET 9.0 (#423)

* Update Directory.Build.props

* Update appveyor.yml

* Delete .github/workflows/snorkell-auto-documentation.yml

* Update appveyor.yml

* Update deep-source.yml

* Update sonarcloud.yml

---------

Co-authored-by: gstraccini[bot] <150967461+gstraccini[bot]@users.noreply.github.com>

.github/workflows/deep-source.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: '9.0.x'
 
       - name: Build and analyze
         env:

.github/workflows/sonarcloud.yml

@@ -50,6 +50,11 @@ jobs:
           echo "KEY=${KEY}" >> "${GITHUB_ENV}"  # Keep the variable KEY as it
           echo "ORG=${ORG@L}" >> "${GITHUB_ENV}" # Lowercase the ORG variable
       
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '9.0.x'
+
       - name: Build and analyze
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup Label="SDK Versions">
-    <DotNetVersions>netstandard2.0;netstandard2.1;net6.0;net8.0</DotNetVersions>
+    <DotNetVersions>netstandard2.0;netstandard2.1;net8.0;net9.0</DotNetVersions>
     <DotNetVersionTests>net8.0</DotNetVersionTests>
   </PropertyGroup>
 

appveyor.yml

@@ -1,4 +1,4 @@
-version: 2.4.{build}
+version: 3.0.{build}
 skip_tags: true
 image: Visual Studio 2022
 configuration: Release
@@ -114,8 +114,8 @@ after_build:
   - ps: |
       foreach($version in $VERSIONS)
       {
-        7z a -tzip -mx9 "$env:SOLUTION_NAME.Core.$version.$env:APPVEYOR_BUILD_VERSION:.zip" Build\Core\$version\
-        Push-AppveyorArtifact "$env:SOLUTION_NAME.Core.$version.$env:APPVEYOR_BUILD_VERSION:.zip"
+        7z a -tzip -mx9 "$env:SOLUTION_NAME.Core.$version.$env:APPVEYOR_BUILD_VERSION.zip" Build\Core\$version\
+        Push-AppveyorArtifact "$env:SOLUTION_NAME.Core.$version.$env:APPVEYOR_BUILD_VERSION.zip"
         foreach($project in $PROJECTS)
         {
           7z a -tzip -mx9 "$env:SOLUTION_NAME.$project.$version.$env:APPVEYOR_BUILD_VERSION.zip" Build\$project\$version\