use nuget package for TableStorage.Abstractions.POCO for secondary indexes project

Author: giometrix

src/TableStorage.Abstractions.POCO.SecondaryIndexes/TableStorage.Abstractions.POCO.SecondaryIndexes.csproj

@@ -14,15 +14,15 @@
     <PackageTags>table-storage azure-table-storage poco table-entities tableentity index secondary-index</PackageTags>
   </PropertyGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\TableStorage.Abstractions.POCO\TableStorage.Abstractions.POCO.csproj" />
-  </ItemGroup>
-
   <ItemGroup>
     <None Include="xtensible-x.png">
       <Pack>True</Pack>
       <PackagePath></PackagePath>
     </None>
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="TableStorage.Abstractions.POCO" Version="2.6.0" />
+  </ItemGroup>
+
 </Project>