Fix deprecation warnings for react >= 15.5.0

[Calyhre]

Migrate React.PropTypes to PropTypes from the prop-types package, regarding the latest react version -> https://facebook.github.io/react/blog/2017/04/07/react-v15.5.0.html#migrating-from-react.proptypes

[jimbolla]

Does this work if someone is still targeting React 14?

[wojtekmaj]

It should. PropTypes were not wildly modified since then.

[gaearon]

It should work. But I'm not sure if putting it in dependencies would be better.

[gaearon]

Yes, lets change this to use dependencies instead.

[Calyhre]

Ok :) I moved it from devDependencies to dependencies, and drop the line for peers.

[gaearon]

We probably don't need Yarn lock? Seems unrelated to this PR.

[Calyhre]

👍 yarn.lock modifications removed

[timdorr]

Yes, you do. yarn.lock files are updated with every PR that modifies the dependencies. It's the same for other systems that use lock files (e.g., rubygems)

[timdorr]

Thanks, @Calyhre. I've got some follow-on fixes for the tests and to put the lock file back. I'll add those after I merge this in. Thanks!

[gaearon]

Yes, you do. yarn.lock files are updated with every PR that modifies the dependencies

Oops, pardon the brainfart. I don't really understand why I said that 😛

[gaearon]

@Calyhre Would you like to also send a PR to backport this to 4.x?

[timdorr]

Just pushed out 5.0.4 with this. Thanks!

[lama-pacos]

old react version will warning
…………

[gaearon]

Yes, we’re discussing this in #669.

[gaearon]

I released [email protected] and [email protected], they won’t have the warning.