Replace FoNet Library With More Generic Solution

[bvanfleet]

Is your feature request related to a problem? Please describe.
A DotNet Core alternative to FoNet needs to be found and added where used in the DotNetCore branch of X12.NET

Describe alternatives you've considered
Don't want to build my own. This is the only conversion project I'd like to take on.

[bvanfleet]

Will assign this after the 5.0.X release

[bvanfleet]

So, I didn't find any simple solution that's already ported to .NET Core. I may need to build in a solution that's converted to the desired framework (not an ideal solution).