Warning NETSDK1138

[caverna]

I don't know .Net Core enough for execute this update.
Is there any chance for you to do the update this template?
Or at least guide me how to do it?
I'm stuck with the references used not being supported at verson 3.0 and above...

Error message:
The target framework 'netcoreapp2.2' is out of support and will not receive security updates in the future.
Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.