v2.0.0 update to .NET 8.0 and support csharp12

• update TargetFramework to net8.0
• support csharp12

Full Changelog: 1.1.0...v2.0.0

1.1.0

What's Changed

• add Diagnostics output option by @itn3000 in #5

New Contributors

• @itn3000 made their first contribution in #5

Full Changelog: 1.0.0...1.1.0

1.0.0

initial release