Fix audio widget serialize option

[christian-byrne]

Closes #866.

serialize should be on options property of widget.

ComfyUI_frontend/src/types/litegraph-augmentation.d.ts

Line 45 in 4052fc5

interface IWidget<TValue = any, TOptions = any> {

ComfyUI_frontend/src/scripts/domWidget.ts

Line 14 in 4052fc5

export interface DOMWidget<T = HTMLElement> {

ComfyUI_frontend/src/scripts/app.ts

Lines 2429 to 2439 in 4052fc5

	// Store all widget values
	if (widgets) {
	for (const i in widgets) {
	const widget = widgets[i]
	if (!widget.options || widget.options.serialize !== false) {
	inputs[widget.name] = widget.serializeValue
	? await widget.serializeValue(node, i)
	: widget.value
	}
	}
	}

API Workflow before:

{
  "15": {
    "inputs": {
      "audio": "song.mp3",
      "upload": ""
    },
    "class_type": "LoadAudio",
    "_meta": {
      "title": "LoadAudio"
    }
  }
}

API Workflow after:

{
  "15": {
    "inputs": {
      "audio": "song.mp3"
    },
    "class_type": "LoadAudio",
    "_meta": {
      "title": "LoadAudio"
    }
  }
}