Update .NET Core libs

Author: xplicit

lib/netstandard1.1/ServiceStack.Client.dll

@@ -15,6 +15,7 @@
           "System.Dynamic.Runtime": "4.0.11",
           "Microsoft.CSharp": "4.0.1",
           "System.Reflection.Emit": "4.0.1",
+          "System.Linq.Expressions": "4.1.0",
           "NETStandard.Library": "1.6.0"
         },
         "runtime": {

lib/netstandard1.1/ServiceStack.Client.pdb

@@ -15,6 +15,7 @@
           "System.Net.Primitives": "4.0.11",
           "System.Net.NetworkInformation": "4.1.0",
           "System.Net.Security": "4.0.0",
+          "System.Reflection.TypeExtensions": "4.1.0",
           "NETStandard.Library": "1.6.0",
           "ServiceStack.Interfaces": "1.0.4.0",
           "ServiceStack.Text": "1.0.4.0"