Update Open.Threading.ReadWriteHelper.csproj

Prep for preview2.

Author: electricessence

ReadWriteHelper/Open.Threading.ReadWriteHelper.csproj

@@ -34,7 +34,7 @@
 	<ItemGroup>
 		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
 		<PackageReference Include="Open.Disposable.ObjectPools" Version="2.8.2" />
-		<!--<PackageReference Include="Open.Threading.ReadWrite" Version="2.0.0-preview1" />-->
+		<PackageReference Include="Open.Threading.ReadWrite" Version="2.0.0-preview2" />
 	</ItemGroup>
 
 	<ItemGroup>
@@ -44,8 +44,4 @@
 		</None>
 	</ItemGroup>
 
-	<ItemGroup>
-	  <ProjectReference Include="..\Source\Open.Threading.ReadWrite.csproj" />
-	</ItemGroup>
-
 </Project>