Make Net.Code.Csv target .NET 4.0

Hi,

I'm using the LumenWorks CSV parser and found your improved version on Nuget. Unfortunately I still need to target Windows XP, but your assembly targets .NET 4.5. Net.Code.Csv compiles fine against .NET 4.0, so would it be possible to upload a new package that targets .NET 4.0?

thanks,
John