Fix package restoration

[gbakeman]

Builds are failing since adding Octokit to the Common library. It seems like the NuGet package isn't being restored correctly.

StackOverflow indicates that there is a specific command to issue for MSBuild to restore properly and then build the solution. msbuild -t:build -restore. The building workflow will be amended here.

• Combine MSBuild-related commands into best-practices version