Merged PR 4906: [release/3.1] Stabilize package versions

Stabilize package versions

Merged PR 4909: [release/3.0] Update dependencies

Update dependencies.  Somehow the last 3.0 EFCore update got missed.

Merge in 'release/2.1' changes

.NET Core 3.1.0

.NET Core 3.1 preview3

Use M.NC.App RefPack version for dotnet targeting pack dependency ver…

…sion (dotnet#16832)

.NET Core 3.1.0 Preview 2

Merged PR 3557: Revert "Wait to Complete Pipe"

Merge pull request dotnet#14843 from aspnet/darc-release/3.1-preview1…

…-3382cea8-4ff2-4bfa-97d9-cff4d21e8414

[release/3.1-preview1] Update dependencies from aspnet/AspNetCore-Tooling

Merge branch 'release/2.1' => 'release/2.2' (dotnet#14708)