fix: `type` and `Class` are overridden in object spread

[eranshmil]

When trying to use the components from the butterfly-vue and butterfly-react, the supplied type and Class properties are being overridden and don't work as intended.

For example:

export default {
  nodes: [
    {
      id: '1',
      label: '张三',
      left: 600,
      top: 50,
      iconType: 'icon-wo',
      Class: CustomNode,
      endpoints: [
        {
          id: 'right',
          orientation: [1, 0],
          pos: [0, 0.5],
        },
        {
          id: 'bottom',
          orientation: [0, 1],
          pos: [0.5, 0],
        },
        {
          id: 'left',
          orientation: [-1, 0],
          pos: [0, 0.5],
        },
      ],
    },
    ...
  ],
  ...
}

The node won't be the CustomNode, but the default Node.

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[cctv1005s]

I don't think is not a good solution to solve this problem. Cause I have rewrited BaseNode.click for the reason of emit node click event to React Element in render.