Merge pull request #80 from NuGet/V2ToV3

Replace V2 with V3 in nuget.config

Author: skofman1

NuGet.config

@@ -9,7 +9,7 @@
   </packageRestore>
   <packageSources>
     <clear />
-    <add key="nuget.org" value="https://www.nuget.org/api/v2/" />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
   <disabledPackageSources>
     <add key="Microsoft and .NET" value="true" />