NuGet.Server 2.11.2

This is a patch release that fixes an issue with NuGet 3.3 requiring a server running at least .NET 4.6.

Bugfixes:

• NuGet.Server - Upgrade to .NET 4.6 (compatibility with NuGet 3.3+) #3063 (fixes NuGet/NuGetGallery#3049)

Features:

• None