(maint) Update dotnet monorepo to v9 (major) (#362)

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Nils Andresen <[email protected]>

Author: renovate[bot]

.github/workflows/build.yml

@@ -52,14 +52,14 @@ jobs:
           # codecov needs 2.1
           # unittests needs 3.1
           # gitversion needs 5.0
-          # .NET 6/7 to build
+          # cake 1.3 needs 6.0
+          # .NET 9 to build
           dotnet-version: |
             2.1
             3.1
             5.0
             6.0
-            7.0
-            8.0
+            9.0
       - name: Cache Tools
         uses: actions/cache@v4
         with:

.github/workflows/codeql-analysis.yml

@@ -36,9 +36,13 @@ jobs:
 
     - uses: actions/[email protected]
       with:
+        # gitversion needs 5.0
+        # cake 1.3 needs 6.0
+        # .NET 9 to build
         dotnet-version: |
           5.0
-          8.0
+          6.0
+          9.0
 
     - name: Cache Tools
       uses: actions/cache@v4

global.json

@@ -1,7 +1,7 @@
 {
     "sdk": {
         "allowPrerelease": true,
-        "version": "8.0.404",
+        "version": "9.0.100",
         "rollForward": "latestFeature"
     }
 }

src/Tasks/Tasks.csproj

@@ -36,7 +36,7 @@
     </ItemGroup>
 
     <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
-        <PackageReference Include="System.Text.Encoding.CodePages" Version="8.0.0" CopyLocal="false" Publish="false" PrivateAssets="All" />
+        <PackageReference Include="System.Text.Encoding.CodePages" Version="9.0.0" CopyLocal="false" Publish="false" PrivateAssets="All" />
     </ItemGroup>
     <Target Name="RemoveMicrosoftBuildDllsFromOutput" AfterTargets="ResolveReferences">
         <PropertyGroup>