Update nuget version

Author: dustinsoftware

build.proj

@@ -11,7 +11,7 @@ of patent rights can be found in the PATENTS file in the same directory.
 	<PropertyGroup>
 		<Major>4</Major>
 		<Minor>0</Minor>
-		<Build>0-beta2</Build>
+		<Build>0-beta4</Build>
 		<Revision>0</Revision>
 		<DevNuGetServer>http://reactjs.net/packages/</DevNuGetServer>
 		<MSBuildCommunityTasksPath>$(MSBuildProjectDirectory)\tools\MSBuildTasks</MSBuildCommunityTasksPath>
@@ -130,7 +130,7 @@ of patent rights can be found in the PATENTS file in the same directory.
 		</ItemGroup>
 		<Exec
 			WorkingDirectory="$(MSBuildProjectDirectory)"
-			Command="tools\NuGet\nuget.exe push %(PackageFiles.Identity) -NonInteractive"
+			Command="tools\NuGet\nuget.exe push %(PackageFiles.Identity) -NonInteractive -Source https://www.nuget.org/api/v2/package"
 		/>
 	</Target>
 	<Target Name="PushDev">