Release v2.2.0.0

Note, this product version v2.2.0 binaries are packaged in the Nuget packages that has one extra increment of the Patch version component - v2.2.1. This is due to the nuget packge being rereleased to address the packaging problem.

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##Changes:

• Implemented MsiExePackage. Triggered by #1554
  The dedicated sample WixBootstrapper_MsiEmbeddedUI shows how to use it

  var bootstrapper =
        new Bundle("Managed Product Bundle",
                    new MsiExePackage(msi)
                    {
                        Name = "ManagedProduct",
                    });

• Issue #1557: Error when specifying Package Platform as ARM64

• Added restart elevated routine for custom BA sample

• Added WixProject.WixBuildCommandGenerated event. Can be used to manipulate wix.exe command line arguments. Triggered by #1557

• Added CommonTasks.MapAsDeferredProperty extension method:

  project.MapAsDeferredProperty("MYPROPERTY");
  // instead of
  project.DefaultDeferredProperties += ",MYPROPERTY";

• Added string.CompleSelfHostedMsi extension for building self executable msi files:

  msi.CompleSelfHostedMsi(msi + ".exe");

• added calling dotnet tool restore when using wix as a local tool. Triggered by #1546