[Bug] word-cloud is not drawn with only one data

[xiaoluoHe]

Version

1.1.0

Link to Minimal Reproduction

none

Steps to Reproduce

const spec = {
  type: 'wordCloud',
  nameField: 'name',
  valueField: 'value',
  data: {
    name: 'baseData',
    values: [
      {
        name: '螺蛳粉',
        value: 957
      },
    ]
  }
};

Current Behavior

blank canvas

Expected Behavior

show the word

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response