Update package.json Upgrade slate

[whereismytee]

old slate will trigger some bug at placeholder with input method, sometime it require to input blank " " at first to void the bug. upgrade slate will fix that.

Description

slate and slate-react upgrade

Fixes #

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x ] My code follows the style guidelines of this project
• [x ] I have performed a self-review of my own code
• [x ] I have commented my code, particularly in hard-to-understand areas
• [x ] I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings

[github-actions]

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[whereismytee]

Signed.

…

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[whereismytee]

wait a moment, the bug still here