- Update actions/checkout to v2.
- setup-dotnet requires specific version or a wildcard so I changed it to 5.0.x so it targets any 5.0 version.
- Updated Raylib-cs.Tests to target net5.0 as we can now use it properly.
- Changed Raylib-cs.proj to use just one target framework.
- Removed targets net47 and netcoreapp3.1 from Raylib-cs.csproj.
- Removed netcoreapp3.1 from dotnetcore.yml workflow.
- Updated github actions workflow to build using .NET Core on Linux, Windows and Mac.
- Updated Raylib-cs.sln with project name changes.
- Added experimental netfx.props to help with building using Mono on Linux.
- Added app.config.
