Refine the build targets for V8

[martintmk]

Looking on our build targets in #1360 it looks like:

<TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.0;net472;net462</TargetFrameworks>

Can we trim these down?

For example:

• Drop net472 (not necessary since we have net462)
• Drop net6.0 and net7.0 in favor of netcoreapp3.1?

[martincostello]

My thoughts:

• I thought net472 was preferred for proper netstandard2.0 compatibility because it wasn't quite right in earlier versions?
• netcoreapp3.1 is out of support now and has less APIs than are available in net6.0 and net7.0, so if we were going to drop anything I'd just drop net7.0 (unless there's some APIs were using from it that help performance).
• I think we want to keep net472;net462 for backwards compatibility for v7 users still on .NET Framework.

I think that would leave us with:

• For 8.0.0: net6.0;netstandard2.0;net472;net462
• For 8.x.x: net8.0;net6.0;netstandard2.0;net472;net462

I think that's a net change of just dropping net7.0, but we could drop net6.0 too if there's nothing useful we're using from it.

[martintmk]

I think that's a net change of just dropping net7.0, but we could drop net6.0 too if there's nothing useful we're using from it.

I believe we are using CancellationTokenSource.TryReset that's there from .NET 6.0.

I thought net472 was preferred for proper netstandard2.0 compatibility because it wasn't quite right in earlier versions?

True.

Just brainstorming, based on this all these targets are kinda usefull :)

[martincostello]

Maybe we just drop net7.0 if we're not actively using anything from it?