#696 Add netstandard2.0 to nuspec
#696 Add netstandard2.0 to nuspec

ronnymgm/csla-light,JasonBock/csla,ronnymgm/csla-light,jonnybee/csla,ronnymgm/csla-light,rockfordlhotka/csla,MarimerLLC/csla,JasonBock/csla,rockfordlhotka/csla,jonnybee/csla,MarimerLLC/csla,JasonBock/csla,MarimerLLC/csla,jonnybee/csla,rockfordlhotka/csla