Updated CI to support .NET 6

Author: jamesmcroft

.github/workflows/ci.yml

@@ -45,12 +45,6 @@ jobs:
         echo "BUILD_VERSION=$version" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf-8 -Append
       shell: pwsh
 
-    - name: Setup NuGet
-      uses: NuGet/[email protected]
-
-    - name: Restore dependencies
-      run: nuget restore $SOLUTION
-
     - name: Setup .NET Core 3.1
       uses: actions/setup-dotnet@v1
       with:
@@ -61,6 +55,17 @@ jobs:
       with:
         dotnet-version: 5.0.x
 
+    - name: Setup .NET 6.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 6.0.x
+
+    - name: Setup NuGet
+      uses: NuGet/[email protected]
+
+    - name: Restore dependencies
+      run: nuget restore $SOLUTION
+
     - name: Setup MSBuild
       uses: microsoft/[email protected]