.NET tool is net5

Description

Hello, I'm wondering if there is a strict limitation of using net5 for the dotnet tool.
As we are still on netcoreapp3.1 we can't install the tool.

Repro steps

Please provide the steps required to reproduce the problem

dotnet tool install dotnet-fsharplint

global.json:

{
  "sdk": {
    "version": "3.1.402",
    "rollForward": "latestMinor"
  }
}

Expected behavior

Well, I was hoping we could use the tool.

Actual behavior

error NU1202: Package dotnet-fsharplint 0.19.0 is not compatible with netcoreapp3.1 (.NETCoreApp,Version=v3.1) / any. Package dotnet-fsharplint 0.19.0 supports: net5.0 (.NETCoreApp,Version=v5.0) / any
The tool package could not be restored.
Tool 'dotnet-fsharplint' failed to install. This failure may have been caused by:

Known workarounds

What you can do in these kinds of situation is target 3.1 and add the <RollForward>Major</RollForward> property in your fsproj. (example).
That way you can support the current LTS but people on newer SDKs can also just use it.

But, maybe this is all very much by design and I'm missing something.

Related information

• Operating system Win 10
• .NET Runtime, CoreCLR or Mono Version : .NETCore 3.1

Start with the dotnet-fsharplint tool project and inspect its target framework, then compare it with the netcoreapp3.1 constraint in global.json. Review the linked Fantomas fsproj example and the reported dotnet tool install failure. Done means establishing whether the tool can support the requested runtime and documenting or implementing the agreed compatibility change.