dotnet list package on a solution outputs duplicate entries for framework

[rohit21agrawal]

running dotnet list package --outdated on nuget.sln leads to entries like the following:

Project `Microsoft.Build.NuGetSdkResolver.Test` has the following updates to its packages
   [netcoreapp1.0]:
   Top-level Package                Requested   Resolved   Latest
   > FluentAssertions               4.19.4      4.19.4     5.5.3
   > Microsoft.Build.Framework      15.6.85     15.6.85    15.9.20
   > Microsoft.NET.Test.Sdk         15.5.0      15.5.0     15.9.0
   > Moq                            4.7.145     4.7.145    4.10.1
   > xunit                          2.3.1       2.3.1      2.4.1
   > xunit.runner.visualstudio      2.3.1       2.3.1      2.4.1

   [netcoreapp1.0]:
   Top-level Package                Requested   Resolved   Latest
   > FluentAssertions               4.19.4      4.19.4     5.5.3
   > Microsoft.Build.Framework      15.6.85     15.6.85    15.9.20
   > Microsoft.NET.Test.Sdk         15.5.0      15.5.0     15.9.0
   > Moq                            4.7.145     4.7.145    4.10.1
   > xunit                          2.3.1       2.3.1      2.4.1
   > xunit.runner.visualstudio      2.3.1       2.3.1      2.4.1

   [net46]:
   Top-level Package                Requested   Resolved   Latest
   > FluentAssertions               4.19.4      4.19.4     5.5.3
   > Microsoft.Build.Framework      15.6.85     15.6.85    15.9.20
   > Microsoft.NET.Test.Sdk         15.5.0      15.5.0     15.9.0
   > Moq                            4.7.145     4.7.145    4.10.1
   > xunit                          2.3.1       2.3.1      2.4.1
   > xunit.runner.visualstudio      2.3.1       2.3.1      2.4.1

   [net46]:
   Top-level Package                Requested   Resolved   Latest
   > FluentAssertions               4.19.4      4.19.4     5.5.3
   > Microsoft.Build.Framework      15.6.85     15.6.85    15.9.20
   > Microsoft.NET.Test.Sdk         15.5.0      15.5.0     15.9.0
   > Moq                            4.7.145     4.7.145    4.10.1
   > xunit                          2.3.1       2.3.1      2.4.1
   > xunit.runner.visualstudio      2.3.1       2.3.1      2.4.1

[nkolev92]

//cc @zivkan I don't know if you had seen any issues like this when working on the tests.

Edit: Actually I think these are tfm/rid combos. Feedback at some point was to not pivot on rids, so probably when the bug sneaked in.