add support for net462, net7.0 and net8.0

Author: matracey

Diff for: .github/workflows/build-and-test.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         build-configuration: [ Debug, Release ]
-        test-target-framework: [ net6.0 ]
+        test-target-framework: [ net8.0, net7.0, net6.0 ]
     name: Build And Test (${{ matrix.test-target-framework }}, ${{ matrix.build-configuration }})
     runs-on: ubuntu-latest
     steps:
@@ -20,6 +20,8 @@ jobs:
         uses: actions/setup-dotnet@v2
         with:
           dotnet-version: |
+            8.x
+            7.x
             6.x
       - name: Restore
         run: dotnet restore ${{ env.JsonDiffPatchSolutionPath }}

Diff for: global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "6.0.417",
+    "version": "8.0.100",
     "rollForward": "minor",
     "allowPrerelease": true
   }

Diff for: test/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
 
     <PropertyGroup>
-        <TargetFrameworks>net48;net6.0</TargetFrameworks>
+        <TargetFrameworks>net462;net48;net6.0;net7.0;net8.0</TargetFrameworks>
     </PropertyGroup>
 
     <PropertyGroup>