LGraphNode ES6 class conversion

[huchenlei]

No description provided.

[huchenlei]

@pythongosssss Can you take a look why some group tests fails?

To reproduce, checkout #68 and npm link it to be used for ComfyUI_frontend with Comfy-Org/ComfyUI_frontend#334.

For following expectation, it seems like widgets remains to be an array that does not hold 'value' key.

    // This will use a primitive widget named 'value'
    expect(group.widgets.length).toBe(1)
    expect(group.widgets['value'].value).toBe('positive')

I am not very familar with the trick here in groupNode.

[pythongosssss]

@huchenlei
Looks like this is due to nodes that dont have titles now being called "Unnamed" instead of using their type name
This is due to classes extending the base class not calling the super ctor correctly

e.g. add a primitive

Before:

With that PR:

[pythongosssss]

The nodes aren't passing the ctor arguments on the call to super() on the UI PR