Nuget package with .net standard support

[vpkopylov]

I'm trying to add integration with asterisk using ARI into net.core 2.2 app. After installing version 1.2.1 of AsterNET.ARI nuget package I get the following warning
warning NU1701: Package 'AsterNET.ARI 1.2.1' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project

There is a version of the nuget package with netstandard support in the source code, But I guess it's not published?
Can you publish the version with netstandard support? Probably, It would be useful not only for me. Please, tell if any help needed.