[core] Add dependency react>=16.3.0 requested by @emotion/core and react-jss

[marco-silva0000]

• I have followed (at least) the PR section of the contributing guide.

There is a missing dependency on this worktree, as react is listed as a peer dependency of dependencies @emotion/core and react-jss.

this raises a warning when running with yarn2(berry) and will break PNP when using material-ui as a dependency.

tagging @arcanis as requested in https://yarnpkg.com/en/docs/pnp/troubleshooting

[mui-pr-bot]

No bundle size changes comparing 60071b8...112df5f

Generated by 🚫 dangerJS against 112df5f

[oliviertassinari]

@marco-silva0000 Would it work with a higher version of React, like the latest version for instance? Also, React is a dependency of the parent package.json. Why do we need to duplicate it?

[marco-silva0000]

Would it work with a higher version of React, like the latest version for instance?

It was wrongly pinned, nice catch.

Also, React is a dependency of the parent package.json. Why do we need to duplicate it?

I'm not sure, but I think yarn PNP needs the worktree to list the full dependencies, otherwise it will raise an error when using material-ui in other projects. I have at least a warning when running the new version of yarn with this package.
@arcanis can explain better when available. I may be mistaken.