Microbenchmark projects broken in master

[pakrym]

They fail to build with the following output:

// Build Exception:   Restoring packages for D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj...
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102: Unable to find package Microsoft.NETCore.App with version (>= 3.0.0)
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102:   - Found 1061 version(s) in https://dotnet.myget.org/F/dotnet-core/api/v3/index.json [ Nearest version: 3.0.0-preview1-27101-02 ]
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102:   - Found 46 version(s) in https://api.nuget.org/v3/index.json [ Nearest version: 2.2.0-preview3-27014-02 ]
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102:   - Found 40 version(s) in https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json [ Nearest version: 2.1.0-preview2-26308-01 ]
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102:   - Found 0 version(s) in https://dotnet.myget.org/F/aspnetcore-tools/api/v3/index.json
D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj : error NU1102:   - Found 0 version(s) in https://dotnet.myget.org/F/roslyn/api/v3/index.json
  Generating MSBuild file D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\obj\BenchmarkDotNet.Autogenerated.csproj.nuget.g.props.
  Generating MSBuild file D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\obj\BenchmarkDotNet.Autogenerated.csproj.nuget.g.targets.
  Restore failed in 2.68 sec for D:\github\aspnet\KestrelHttpServer\benchmarks\Kestrel.Performance\bin\Release\netcoreapp2.2\5db66748-9eea-4ad3-9af5-3c475000fcc2\BenchmarkDotNet.Autogenerated.csproj.

[pakrym]

We need to update to 0.11.2 that added 3.0 preview support (https://benchmarkdotnet.org/changelog/v0.11.2.html)

[pakrym]

Not anymore.