Allow react 0.14.0-beta1 as peer dependency

[cesarandreu]

Would you consider allowing react 0.14.0-beta1 as a peer dependency?

I haven't tried react-helmet with react 0.14.0-beta1 yet, but from glancing at the code it looks like 0.14.0-beta1 should work.

For reference, a project that support react 0.14.0-beta1 is react-dnd, they declare the peer dependency is declared as:

{
  "peerDependencies": {
    "react": ">=0.13.0 <0.15.0 || 0.14.0-beta1"
  }
}

[cwelch5]

Thanks for the inquiry. Yes, we definitely want to open react-helmet up to be utilized in new versions of React.

PR is here: #20

[cesarandreu]

Awesome! :D