Merge pull request #126 from donnytian/develop

fix test framework for publish-nuget.yml

.github/workflows/publish-nuget.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Build
         run: dotnet build --no-restore Npoi.Mapper/Npoi.Mapper.sln
       - name: Test
-        run: dotnet test --no-build --verbosity normal Npoi.Mapper/Npoi.Mapper.sln
+        run: dotnet test --framework net6.0 --no-build --verbosity normal Npoi.Mapper/Npoi.Mapper.sln
 
       # Publish
       - name: publish on version change