Add .NET 8 support and also fix NU1903 NuGet.Protocol' 5.11.3 has a known high severity vulnerability warning

[solrevdev]

See #4

[ThomasArdal]

Thanks! I forgot how this works. If the project only targets .NET 8, users need .NET 8 installed, right? If we target both .NET 6 and 8, people can still run it with "only" .NET 6 installed?

[solrevdev]

Thanks! I forgot how this works. If the project only targets .NET 8, users need .NET 8 installed, right? If we target both .NET 6 and 8, people can still run it with "only" .NET 6 installed?

No worries, yes that's exactly right. by adding the following you support multiple frameworks so folk with the old LTS .NET 6 only can still use it and anyone with the newer .NET 8 can also use it.

 <TargetFrameworks>net6.0;net8.0</TargetFrameworks>

I did upgrade the nuget packages so perhaps check they still support .NET6 with the new versions but I am sure they are fine. I can't see them dropping support just yet. Just adding etc

[ThomasArdal]

I think having both .NET 6 and .NET 8 in there is fine then. I tested the code with the updated packages. Works great 👯 Thank you very much.

[solrevdev]

I think having both .NET 6 and .NET 8 in there is fine then. I tested the code with the updated packages. Works great 👯 Thank you very much.

And I only have .NET 8 installed and it works great for me on macOS 14.1.1 (23B81).

FYI it installed 1.0.30 for me which looks right to me

Thanks for merging and sorting so quick!