Make sure that the TinCan/Properties/AssemblyInfo.cs has been updated with new release version.
TinCan -> Properties -> Assembly Information
Then set the Build Configuration to "Release" and build the solution. (Verify bin/Release/TinCan.dll has correct version.)
With nuget.exe installed and in your path do:
cd TinCan
nuget pack TinCan.csproj -sym -Prop Configuration=Release
nuget push TinCan.(version).nupkg
Commit the updated assembly information file and push to master. Upload the generated TinCan.(version).nupkg as a GitHub tag release.