change default import into named import

[xiaoxiangmoe]

Consistent with the code below:

https://github.com/facebook/create-react-app/blob/dc133a351f16c2e2e7991416a9ebdaab3c2b6ec1/packages/react-scripts/template-typescript/src/App.tsx#L1

[Timer]

import * as React from 'react'; seems to be an accident, all this code should read import React from 'react';.

Thanks for the PR, can you update the other file?

[xiaoxiangmoe]

@Timer In TypeScript Doc it write:

import*asReactfrom"react";

Should we use named export rather than default export?

Named export seems to be a more accurate way of expressing the export of react.

I'll open another pull request to change named import into default import.