Bump to react 18 and move to mui

[w1nklr]

Bumps react from 16.14.0 to 18.2.0.
Bumps react-dom from 16.14.0 to 18.2.0.
Remove react-test-renderer.

Move from @material-ui to @mui 5.13.7.

Set both react and @mui packages as peer dependencies.

Bump storybook/* from 6.4.18 to 6.5.16.

[HansKallekleiv]

Support for React 18 is an experimental feature in Dash and has to be explicitly activated. Default it uses React 16.

Use React version 18.2 · Issue #2254 · plotly/dash (github.com)

I'm skeptical to adding this experimental feature to our production code.

Can this PR wait? Alternatively can we make sure the code is backwards compatible with 16? E.g. not use createRoot?

[w1nklr]

Support for React 18 is an experimental feature in Dash and has to be explicitly activated. Default it uses React 16.

Use React version 18.2 · Issue #2254 · plotly/dash (github.com)

I'm skeptical to adding this experimental feature to our production code.

Can this PR wait? Alternatively can we make sure the code is backwards compatible with 16? E.g. not use createRoot?

OK, we can postpone this PR.
The move to mui 5 does break compatibility with react 16, not only the move to createRoot. :/