During some code cleanup I entoutered an issue with an assemblybinding

After some looking into the code of Log4Net appender I encountered this curious piece of code in the csproj file.

  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
    <PackageReference Include="log4net" Version="2.0.8" />
  </ItemGroup>

  <ItemGroup Condition=" '$(TargetFramework)' != 'netstandard1.3' ">
    <PackageReference Include="log4net" Version="2.0.7" />
  </ItemGroup>

What is special about netstandard1.3 that only this target deserves 2.0.8?

Repro Steps

1. Just add reference to Log4NetAppender

Actual Behavior

It depends on log4net 2.0.7

Expected Behavior

It depends on log4net 2.0.8