Merge master to release/dev16.2#6773

Merged

4 commits merged intorelease/dev16.2from

merges/master-to-release/dev16.2

May 18, 2019

Commits on May 14, 2019

Update dependencies from https://github.com/dotnet/arcade build 20190513.3
dotnet-maestro
committed

Commits on May 15, 2019

Update dependencies from https://github.com/dotnet/arcade build 20190514.13
dotnet-maestro
committed

Commits on May 17, 2019

Enable roll forward in our .NET Core exes
brettfo
committed

Commits on May 18, 2019

Merge pull request #6765 from dotnet/arcade-net3
brettfo
authored