Update Generator & Added Nested Namespace Support

[mattleibow]

Description of Change

Dependencies need updating as well as more support for "more advanced" namespaces.

The .json file in the bindings folder now supports nested namespaces:

// configuration for the libSkiaSharp binary
{
  "dllName": "SKIA",
  // the root namespace
  "namespace": "SkiaSharp",
  "namespaces": {
    // typical prefix replacement using the root namespace
    // implicit ` "cs": "" `
    "sk_": {
      "prefix": "SK"
    },
    // replacement of using the type suffix for a nested namespace
    "sksg_": {
      "cs": "SceneGraph",
      "prefix": ""
    },
    "skottie_": {
      "cs": "Skottie",
      "prefix": ""
    }
  }
}

[mattleibow]

/azp run SkiaSharp

[azure-pipelines]

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