Migrate to import * as React from 'react'

[TrySound]

Ref https://github.com/facebook/react/pull/18102

[jquense]

does this make sense to change until they actually provide an esm build?

[TrySound]

Rollup optimise import * as React from 'react' into import{createElement as a}from 'react'; which is not the case with default export prop access which may be side effectful.

Also it's a good for users to see these changes and start migration earlier.