fix: treemap align to other data types

[Koooooo-7]

Description

close #193

Please share your ideas and awesome changes to let us know more

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Type of change

• Bug fix (Non-breaking change which fixes an issue)
• New feature (Non-breaking change which adds functionality)
• Breaking change (Would cause existing functionality to not work as expected)
• Others

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Examples:

If there contains new features of charts, are you willing to submit a PR
on go-echarts/Examples?

This is absolutely not required, but we are happy to see that you could share or update the related
charts' examples to benefit more users.

• Yes, I am willing to submit a PR on Examples!