Bump to React 16

[SandroMachado]

This PR adds support to React 16.

[rafaeleyng]

Hi @qimingweng , if you could accept this PR would be very nice!

Thank you and thank @SandroMachado !

[Dean177]

This will still work with react 15.6, you should expand the version range to be more permissive.
Something like 15.x || ^16.0.0 would be better.

The react & prop-types peerDependencies should also be more lenient.

[Dean177]

Until this PR gets merged I have forked this repo and committed the built library so it can be used as a dependency.
You can use it by changing the relevant line in your package.json to

"react-modal-dialog": "Dean177/react-modal-dialog#support\/bump-react",

[jeron-diovis]

This package also depends on react-center-component. Same author, and all the same problems. That package also should be updated to make react-modal-dialog usable with react@16.

[SandroMachado]

@Dean177 what is blocking this PR from merge?

[Dean177]

No idea, I think you want @qimingweng rather than me though.

[ilyadoroshin]

@qimingweng hey, man! we would love to see this PR already!

[pippinlee]

Could also use this merged. Thanks!

[ttbarnes]

Looking forward to having this merged 😄

[ali-aka-ahmed]

bump can @qimingweng please merge!