update to latest and publish, NER support in CORE 6

[papyr]

Hello now that core has fully coverage including the new portable libs. can you release this as a .NET Core 6 LTS nuget.

I have an asp core package that is struggling to run this.

Also can you please help to make sure it runs with the latest NLP lib.

[jeanlopes]

It would be possible to update to .NET 7 as well? I tried to run that using donet 7 but it doesn't work there at all

[nrcpp]

NltkNet does not maintained last 3 years because of no time/motivation. If you can create pull request with updated .NET framework and IronPython versions then I'll publish it with respect. Thank you for understanding.