react-devtools-inline package now has react@experimental dependency

[bvaughn]

I recently updated DevTools to use the new, experimental getCacheForType API (#20548) which works well for the browser and standalone extension versions, because they bundle their own version of React (the experimental release). This has left the react-devtools-inline package (used by e.g. Code Sandbox) in an unreleasable state though until the new Suspense APIs are released as stable.

Perhaps I could go back to the last commit prior to #20548 and do one final release, but then I will be blocked.