Cannot nest response.CompoundFilter

[mariuswilms]

I'm trying to create a filter that uses nested compound filters, similar to what is described in the docs:

{
  "type": "or",
  "filters": [
    {
      "type": "and",
      "filters": [
        {
          "type": "or",
          "filters": [
            {
              "type": "eq",
              "property": "project_code",
              "value": "X123"
            },
            {
              "type": "eq",
              "property": "project_code",
              "value": "X999"
            }
          ]
        },
        {
          "type": "eq",
          "property": "confidentiality",
          "value": "top_secret"
        }
      ]
    },
    {
      "type": "eq",
      "property": "language",
      "value": "en"
    }
  ]
}

However, the CompoundFilter is defined to allow only a slice of ComparisonFilter, although the comment rightfully assumes both Compound and ComparisonFilter should be acceptable:

type CompoundFilter struct {
	// Array of filters to combine. Items can be `ComparisonFilter` or
	// `CompoundFilter`.
	Filters []ComparisonFilter
	// Type of operation: `and` or `or`.
	//
	// Any of "and", "or".
	Type CompoundFilterType
}

This prevents me from nesting CompoundFilter and create complex conditions. Thanks for reviewing this issue and your work to provide this API client to the Go community.