Add indeterminate on Checkbox component

[KumJungMin]

Suggest

• According to mdn docs, indeterminate is established and works across many devices and browser versions. It’s been available across browsers since January 2020. (mdn docs link)

• The indeterminate refers to the state of being neither checked nor unchecked. The image below is an example of indeterminate.
• Because it officially provides indeterminate, Developers expect checkboxes to provide indeterminate option.
• So, i suggest indeterminate option on Checkbox component.
• Thank you for read this suggestion. have a nice day :)

[tugcekucukoglu]

The version 4.0.0.beta-1 will be released with indeterminate property.

Thank you!

[KumJungMin]

Thank you! 😄 Have a nice day