What about keyframes animation?

Do styled-jss support keyframes animations and what is the syntax? Unfortunately i wasn't able to get it work using example from [here](https://github.com/cssinjs/jss/blob/master/docs/json-api.md#keyframes-animation)

Start by comparing styled-jss usage with the linked JSS JSON API keyframes animation example. Verify whether styled-jss supports keyframes and identify the syntax or limitation that explains why the example does not work; done means the supported usage or lack of support is clearly documented.

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