Update to Preview4 and include Tier3 repos#1621

Merged

dseefeld merged 57 commits into

dotnet:masterfrom

dseefeld:preview4

Jul 3, 2020

Commits on Jun 8, 2020

Commits on Jun 9, 2020

Commits on Jun 11, 2020

Commits on Jun 16, 2020

Set UseStableVersions to false
dseefeld
committed

Commits on Jun 24, 2020

Upgrade Roslyn to netcoreapp5.0.
crummel
committed

Commits on Jun 25, 2020

Update previously-source-built packages to a 3.1+5.0 bootstrap archive.
crummel
committed
Add patch to use MS.Private.CoreFX.NetCoreApp as netcoreapp3.1 in runtime since that's all previously-source-built supports.
crummel
committed

Commits on Jun 27, 2020

Upgrade ref packages and previously-source-built packages.
crummel
committed