Remove package dependency from Kestrel to Kestrel.Transport.Libuv

[natemcmaster]

Related issue: #2360

Remove the package dependency from Microsoft.AspNetCore.Server.Kestrel to Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.

This will break those who only depend on the Microsoft.AspNetCore.Server.Kestrel package and who call WebHostBuilderLibuvExtensions.UseLibuv(). These users can fix their projects by re-adding the dependency to libuv.

<PackageReference Include="Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv" Version="2.1.0" />

To minimize the number of 2.0 users that this will break, we should keep Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv in the dependency graph of Microsoft.AspNetCore.All.

Design meeting notes from March 2, 2018

/cc @halter73 @davidfowl @muratg

[muratg]

@natemcmaster Libuv package is directly in All I assume? So if you're using the metapackage, you wouldn't be broken? (As long as we don't remove it)

[natemcmaster]

Correct you won't be broken. No, .All doesn't directly reference "Libuv", but it does directly reference "Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv", so you still get the Libuv package transitively in .All

[halter73]

Fixed by #2392 and aspnet/Universe#959