Support for `BigInteger` (C#) <-> `PyInt` by lostmsu · Pull Request #1710 · pythonnet/pythonnet

What does this implement/fix? Explain your changes.

Adds various conversions between PyInt and System.Numerics.BigInteger.

Does this close any currently open issues?

fixes #1642 (comment)

Checklist

Check all those that are applicable and complete.