Add new projects targeting .NET Core 3.1#3181

Merged

amaitland merged 8 commits intocefsharp:masterfrom kpreisser:netcore31

Jul 23, 2020

+1,700-11

Commits on Jul 11, 2020

Add .NET Core 3.1 projects for CefSharp, CefSharp.Core, CefSharp.BrowserSubprocess.Core, CefSharp.WinForms, CefSharp.Wpf, CefSharp.OffScreen.
kpreisser
committed

Commits on Jul 16, 2020

Add CefSharp.Example.netcore and CefSharp.WinForms.Example.netcore.
kpreisser
committed
Follow-up: Remove properties from the example projects that are also not used in the corresponding .NET Framework projects.
kpreisser
committed