Update README to direct users to specific version of typings

[lostfictions]

See discussion at DefinitelyTyped/DefinitelyTyped#26363 -- typings for react-pointable had to be updated for compatibility with React 16.4 (since all of DefinitelyTyped is, unfortunately, versioned in lockstep). The upshot is that the latest version of @types/react-pointable will not expose pointer events when used with @types/react <16.4.

[MilllerTime]

Nice, thanks for helping to get the React types straightened out!

[MilllerTime]

I'm a TypeScript novice, but I understand that installing the latest version of @types/react-pointable with an older version of React would break things. I would think it might be helpful to consumers of this package if there was a bit more information about this situation. Something like:

If you're using a version of React < 16.4, run

npm install --save-dev @types/react-pointable@1.1.3

If you happen to be using React 16.4+ and can't yet remove this package for some reason, you can instead run

npm install --save-dev @types/react-pointable

To learn more, see the discussion at DefinitelyTyped/DefinitelyTyped#26363

There may be a better way to explain this, and I could also be overthinking this entirely.

[lostfictions]

@MilllerTime Sounds good to me -- I've amended the PR.

[MilllerTime]

Cool. Thanks again.