XPNet appears to break if targeting .NET Core 3.1

[hickorysb]

If I try to target .NET Core 3.1 I get the following in the log:

[07:42:07 P] XPNet CLR: Looking for plugin in (C:\Program Files (x86)\Steam\steamapps\common\X-Plane 11\Resources\plugins\XP.Interface).
[07:42:07 P] XPNet CLR: Inspecting plugin candidate: (Path = C:\Program Files (x86)\Steam\steamapps\common\X-Plane 11\Resources\plugins\XP.Interface\XP.Interface.dll).
[07:42:07 P] XPNet CLR: Skipping plugin type (XP.Interface.Plugin) because it could not be loaded from the assembly: (Assembly = C:\Program Files (x86)\Steam\steamapps\common\X-Plane 11\Resources\plugins\XP.Interface\XP.Interface.dll).
[07:42:07 P] XPNet CLR: Failed to find a plugin to load. Will tell X-Plane we failed to start.```

[jaurenq]

Hey hickorysb, I'll be where I can spend some time on XPNet soon, I'll check this out.