How to get nuget package to include non dll in publish output

I'm using the Select.HtmlToPdf which requires Select.Html.dep file to be located in the same directory asSelect.HtmlToPdf.dll, but I'm finding it missing from publish output. I notice the nuget package tries to include a .targets file:

<?xml version="1.0" encoding="utf-8"?><Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"><ItemGroup><AvailableItemName Include="Dependencies" /></ItemGroup><ItemGroup><Dependencies Include="$(MSBuildThisFileDirectory)dep\*"><TargetPath></TargetPath></Dependencies></ItemGroup>  <PropertyGroup><PrepareForRunDependsOn>$(PrepareForRunDependsOn);
      CopyDependencies</PrepareForRunDependsOn></PropertyGroup><Target Name="CopyDependencies" DependsOnTargets="CopyFilesToOutputDirectory"><Copy SourceFiles="@(Dependencies)"
          DestinationFiles="@(Dependencies->'$(OutDir)\%(Filename)%(Extension)')"
          Condition=""><Output TaskParameter="DestinationFiles" ItemName="FileWrites" /></Copy></Target>  </Project>

Which doesn't work, and I used to resort to adding this in my app.pubxml file:

<Target Name="CustomCollectFiles"><ItemGroup><_CustomFiles Include="bin\Select.Html.dep" /><FilesForPackagingFromProject Include="%(_CustomFiles.Identity)"><DestinationRelativePath>bin\Select.Html.dep</DestinationRelativePath></FilesForPackagingFromProject></ItemGroup></Target><PropertyGroup><CopyAllFilesToSingleFolderForPackageDependsOn>CustomCollectFiles</CopyAllFilesToSingleFolderForPackageDependsOn><CopyAllFilesToSingleFolderForMsdeployDependsOn>CustomCollectFiles</CopyAllFilesToSingleFolderForMsdeployDependsOn></PropertyGroup>

In ASP.NET 4.5 apps, but not sure how to change this to the work with new ASP.NET 5 apps (it needs to be output toapproot\packages\Select.HtmlToPdf\1.2.0\lib\net40). If this could be fixed at the nuget package level for both 4.5 and 5 apps that'd be ideal I can go back to package author with the fix, but if I could alter my app to copy file to publish output that'd be good.