[Request] Add Radiobox.css

[45kb]

Library name: Radiobox.css
Git repository url: https://github.com/720kb/radiobox.css
npm package url(optional):
License(s): MIT
Official homepage: https://720kb.github.io/radiobox.css
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Please read the README.md and CONTRIBUTING.md document first.

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it'll be faster than just opening a request issue,
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