netcoreapp5.0 not supported, 3.0 is "out of support"

[lucastheisen]

Attempting to use the current latest release on .NET Core 5.0 gives:

[gitlab@f1b1b25c46f1 test]$ dotnet tool install --tool-path /tmp/ dotnet-ildasm
You can invoke the tool using the following command: dotnet-ildasm
Tool 'dotnet-ildasm' (version '0.12.2') was successfully installed.
[gitlab@f1b1b25c46f1 test]$ /tmp/dotnet-ildasm
It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '3.0.0' was not found.
  - The following frameworks were found:
      5.0.0 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=3.0.0&arch=x64&rid=centos.7-x64

Taking a look at build.sh, it appears to be building for each version from 2.0 -> 3.0.